PUBLICATIONS
 

2003	Dehant, V., Feissel-Vernier, M., de Viron, O., Ma, C., Yseboodt, M., Bizouard, C., Remaining error sources in the nutation at the sub-milliarcsecond level, J. Geophys. Res., vol. 108, no. B5, 2275, doi: 10.1029/2002JB001763. Petrov, L. and C. Ma, Study of harmonic site position variations determined by VLBI, J. Geophys. Res., vol. 108, no. B4, 2190, doi: 10.1029/2002JB001801. Fomalont, E. B., L. Petrov, D. S. MacMillan, D. Gordon, C. Ma, The second VLBA calibrator survey: VCS2, Astro. J., 126: 2562-2566.
2001	Ma, C., Extragalactic reference frames, in Encyclopedia of Astronomy and Astrophysics, P. Murdin, ed., Institute of Physics Publishing.
2000	Ma, C. and D. S. MacMillan, VLBI observations of Earth orientation, Proc. IAU Colloquium 178, Polar Motion: Historical and Scientific Problems, S. Dick and. D. McCarthy, eds., pp. 251-260.
1999	MacMillan, D. S. and C. Ma, VLBI measurements of Caribbean and South American motion, Geophys. Res. Lett., 26, 919-922, 1999. Ma, C. and D. S. MacMillan, Three-dimensional VLBI velocities in a global reference frame, GPS99, Tsukuba, 1999. Ma, C. and M. Eubanks, Extension and maintenance of the ICRF, Proc. 13th Working Meeting on European VLBI for Geodesy and Astrometry, W. Schlueter and H. Hase, eds., Wettzell, 1999. MacMillan, D. S., Himwich, W. E., Vandenberg, N. R., Thomas, C. C., Bosworth, J. M., Chao, B., Clark, T. A., Ma, C., CORE: Continuous, high-accuracy Earth orientation measurements, Proc. 13th Working Meeting on European VLBI for Geodesy and Astrometry, W. Schlueter and H. Hase, eds., Wettzell, 1999.
1998	Gipson, J. M. and C. Ma, Site displacement due to variation in Earth rotation, J. Geophys. Res., 103, 7337-7350, 1998. Ma, C., Arias, E. F., Eubanks, T. M., Fey, A. L., Gontier, A.-M., Jacobs, C. S., Sovers, O. J., Archinal, B. A., Charlot, P., The International Celestial Reference Frame as realized by very long baseline interferometry, Astron. J., 116, 516-546, 1998. Clark, T. A., Ma, C., Ryan, J. W., Chao, B. F., Gipson, J. M., MacMillan, D. S., Vandenberg, N. R., Eubanks, T. M., Niell, A. E., Earth rotation yields valuable information about the dynamics of the Earth system, EOS Trans. Am. Geophys. Union, 79, 205-206, 1998. Gipson, J. M. and C. Ma, Site displacement due to variation in Earth rotation, J. Geophys. Res., 103, 7337-7350, 1998. Ma, C., Arias, E. F., Eubanks, T. M., Fey, A. L., Gontier, A.-M., Jacobs, C. S., Sovers, O. J., Formulation of the International Celestial Reference Frame, in Highlights of Astronomy, J. Andersen, ed., 11A, 281-286, Kluwer, Dordrecht, 1998. Ma, C., Arias, E. F., Eubanks, T. M., Fey, A. L., Gontier, A.-M., Jacobs, C. S., Sovers, O. J., Archinal, B. A., Charlot, P., The International Celestial Reference Frame as realized by very long baseline interferometry, Astron. J., 116, 516-546, 1998. Ma, C., Gipson, J. M., VLBI applied to reference frames, IAG/IGGOS, Munich, 1998. MacMillan, D. S. and C. Ma, Using meteorological data assimilation models in computing tropospheric delays at microwave frequencies, Phys. Chem. Earth, 23, 97-102, 1998.
1997	Gontier, A.-M., Feissel, M., Ma, C., The contribution of VLBI to the realization of a celestial reference system, in Definition and Realization of the International Celestial Reference System by VLBI Astrometry of Extragalactic Objects, C. Ma and M. Feissel, eds., I-3 B I-14, IERS Tech. Note 23, Paris Observatory, Paris, 1997. Ma, C., Arias, E. F., Eubanks, T. M., Fey, A. L., Gontier, A.-M., Jacobs, C. S., Sovers, O. J., Realization of the ICRF from VLBI astrometry, JD7, IAU General Assembly, Kyoto, 1997. Ma, C., Arias, E. F., Eubanks, T. M., Fey, A. L., Gontier, A.-M., Jacobs, C. S., Sovers, O. J., Archinal, B. A., Charlot, P., The International Celestial Reference Frame realized by VLBI, in Definition and Realization of the International Celestial Reference System by VLBI Astrometry of Extragalactic Objects, C. Ma and M. Feissel, eds., II-3 B II-44, IERS Tech. Note 23, Paris Observatory, Paris, 1997. Ma, C., Feissel, M., eds., Definition and Realization of the International Celestial Reference System by VLBI Astrometry of Extragalactic Objects, IERS Tech. Note 23, Paris Observatory, Paris, 1997. MacMillan, D. S. and C. Ma, Atmospheric gradients and the VLBI terrestrial and celestial reference frames, Geophys. Res. Lett., 24, 453-456, 1997.
1996	Chao, B. F.; Ray, R. D.; Gipson, J. M.; Egbert, G. D.; Ma, C., Diurnal/semidiurnal polar motion excited by oceanic angular momentum, Journal of Geophysical Research, vol. 101, 20,151-20,163, 1996. Souchay, J.; Feissel, M.; Ma, C., Precise modeling of nutation and VLBI observations, Astronomy and Astrophysics Supplement, vol. 116, 473-481, 1996.
1995	Johnston, K. J.; Fey, A. L.; Zacharias, N.; Russell, J. L.; Ma, C.; De Vegt, C. Reynolds, J.E.; Jauncey, D.L.; Archinal, B.A.; Carter, M.S.; Corbin, T.E.; Eubanks, T.M.; Florkowski, D.R.; Hall, D.M.; McCarthy, D.D.; McCulloch, P.M.; King, E.A.; Nicoldson, G.; Shaffer, D.B., A Radio Reference Frame, Astronomical Journal, vol. 110, 880-915, 1995.
1994	Fey, A. L.; Russell, J. L.; De Vegt, C.; Zacharias, N.; Johnston, K. J.; Ma, C.; Hall, D. M.; Holdenried, E. R., Radio optical reference frame. VI: Additional source positions in the northern hemisphere, Astronomical Journal, vol. 107, no. 1, 385391, 1994. Macmillan, D. S.; Ma, C., Evaluation of very long baseline interferometry atmospheric modeling improvements, Journal of Geophysical Research, vol. 99, no. B1, 637651, 1994. Perlman, E. S.; Stocke, J. T.; Shaffer, D. B.; Carilli, C. L.; Ma, C., High dynamic range radio observations of PKS 1413+135, a BL Lacertae object with a parsec-scale counterjet, Astrophysical Journal Letters, vol. 424, 269-272, 1994. Russell, J. L.; Reynolds, J. E.; Jauncey, D. L.; De Vegt, C.; Zacharias, N.; Ma, C.; Fey, A. L.; Johnston, K. J.; Hindsley, R.; Hughes, J. A., A radio/optical reference frame. V: Additional source positions in the midlatitude southern hemisphere, Astronomical Journal, vol. 107, no. 1, 379-384, 1994. Walter, H. G.; Ma, C., Correction to the lunisolar precession from very long baseline interferometry, Astronomy and Astrophysics, vol. 284, no. 3, 1000-1006, 1994. Watkins, M. M.; Eanes, R. J.; Ma, C., Comparison of terrestrial reference frame velocities determined from SLR and VLBI, Geophysical Research Letters, vol. 21, no. 3, 169172, 1994.
1993	Gordon, D., Ma, C., Ryan, J.W., Results from the CDP mobile VLBI program in the western United States, in Contributions of Space Geodesy to Geodynamics, D.E. Smith and D.L. Turcotte, eds., 131-138, AGU Geodynamics Series, Washington, 1993. Himwich, W.E., Watkins, M.M., Ma, C., MacMillan, D.S., Clark, T.A., Eanes, R.J., Ryan. J.R., Schutz, B.E., Tapley, B.D., The consistency of the scale of the terrestrial reference frames estimated from SLR and VLBI data, in Contributions of Space Geodesy to Geodynamics, D.E. Smith and D.L. Turcotte, eds., 113-120, AGU Geodynamics Series, Washington, 1993. Jauncey, D.L., Reynolds, J.E., Tzioumis, A.K., Johnston, K.J., Russell, J.L., Fey, A.L., McCulloch, P.M., King, E.A., De Vegt, C., Zacharias, N., Nicolson, G.D., MacLeod, G.C., Ma, C., Archinal, B.A., Carter, M.S., Holdenreid, E., Kingham, K., Malin, D.F., Takahashi, Y., Kawaguchi, N., White, G.L., Shaffer, D.B., Accurate southern hemisphere astrometry, in Proc. Int.. Workshop for Reference Frame Establishment and Technical Development in Space Geodesy: iRiS =93, 277-284, Communications Research Laboratory, Koganei, 1993. Ma, C., Russell, J.L., Astrometry and geodesy from VLBI, in Developments in Astrometry and Their Impact on Astrophysics and Geodynamics, I.I. Mueller and B. Kolaczek, eds., 159-171, Kluwer, Dordrecht, 1993. Ma, C., Ryan, J.W., Gordon, D., Caprette, D.S., Himwich, W.E., Reference frames from CDP VLBI data, in Contributions of Space Geodesy to Geodynamics, D.E. Smith and D.L. Turcotte, eds., 121-145, AGU Geodynamics Series, Washington, 1993. Robbins, J.W., Smith, D.E., Ma, C., Horizontal crustal deformation and large scale plate motions inferred from space geodetic techniques, in Contributions of Space Geodesy to Geodynamics, D.E. Smith and D.L. Turcotte, eds., 21-49, AGU Geodynamics Series, Washington, 1993. Rogers, A.E.E., Cappallo, R.J., Corey, B.E., Hinteregger, H.F., Niell, A.E., Phillips, R.B., Smythe, D.L., Whitney, A.R., Herring, T.A., Bosworth, J.M., Clark, T.A., Ma, C., Ryan, J.R., et al., Improvements in the accuracy of geodetic VLBI, in Contributions of Space Geodesy to Geodynamics, D.E. Smith and D.L. Turcotte, eds., 47-63, AGU Geodynamics Series, Washington, 1993. Ryan, J.W., Clark, T.A., Ma, C., Gordon, D., Caprette, D.S., Himwich, W.E., Global scale tectonic plate motions measured with CDP VLBI data, in Contributions of Space Geodesy to Geodynamics, D.E. Smith and D.L. Turcotte, eds., 37-49, AGU Geodynamics Series, Washington, 1993. Sauber, J.M., Clark, T.A., Bell, L.J., Lisowski, M., Ma, C., Caprette, D.S., Geodetic measurement of static displacement associated with the 1987-1988 Gulf of Alaska earthquakes, in Contributions of Space Geodesy to Geodynamics, D.E. Smith and D.L. Turcotte, eds., 233-248, AGU Geodynamics Series, Washington, 1993.
1992	Fey, A. L., Russell, J. L., Ma, C., Johnston, K. J., Archinal, B. A., Carter, M. S., Holdenried, E. R., Yao, Z., De Vegt, C., Zacharias, N., A radio optical reference frame. IV Additional radio source positions in the Northern Hemisphere, Astron. J., 104, 891-896, 1992. Rius, A., Zarraoa, N., Sardon, E., Ma, C., Centimeter repeatability of the VLBI estimates of European baselines, Bull. Geod., 66, 21-26, 1992. Russell, J. L., Jauncey, D. L., Harvey, B. R., White, G. L., Reynolds, J. E., Ma, C., Johnston, K. J., Nothnagel, A., Nicolson, G., Kingham, K., A radio optical reference frame. III Additional radio and optical positions in the Southern Hemisphere, Astron. J., 103, 2090-2098, 1992.
1991	C.E. Kuehn, W.E. Himwich, T.A. Clark, C. Ma. "An Evaluation of Water Vapor Radiometer Data for Calibration of the Wet Path Delay in VLBI Experiments," Radio Science, 26, 1381-1391, 1991. J.L. Russell, K.J. Johnston, C. Ma, D.B. Shaffer, C. de Vegt. "A Radio Optical Reference Frame. II. Additional Radio and Optical Source Positions in the Northern Hemisphere," Astron. J. 101, 2266, 1991. C. Ma, D.B. Shaffer. "Stability of the Extragalactic Reference Frame Realized by VLBI" in Reference Systems, IAU Colloq. 127, J.A. Hughes ed., U.S. Naval Observatory, Washington, 1991. J.R. Ray, C. Ma, J.W. Ryan, T.A. Clark, R.J. Eanes, M.M. Watkins, B.E. Schutz, B.D. Tapley. "Comparison of VLBI and SLR Geocentric Site Coordinates," Geophys. Res. Let. 18, 231, 1991.
1990	C. Ma, J.M. Sauber, L.J. Bell, T.A. Clark, D. Gordon, W.E. Himwich, J.W. Ryan. "Measurement of Horizontal Motions in Alaska Using Very Long Baseline Interferometry" J. Geophys. Res. 95, B13, 21991, 1990. D.S. Caprette, C. Ma, J.W. Ryan. Crustal Dynamics Project Data Analysis 1990, VLBI Geodetic Results 1979?1989" NASA TM-100765, 1990. C. Ma. "The VLBI Terrestrial Reference Frame of the Crustal Dynamics Project" Eos 71, 1274, 1990. T.A. Clark, C. Ma, J. Sauber, J.W. Ryan, D. Gordon, D.B. Shaffer, D.S. Caprette, N.R. Vandenberg. "Geodetic Measurement of Deformation in the Loma Prieta, California Eariquake with Very Longs Baseline Interferometry," Geophys. Res. Lett. 17, 1215, 1990. C. Ma, D.B. Shaffer, C. de Vegt, K.J. Johnston, J.L. Russell. "A Radio Optical Reference Frame. I. Precise Radio Source Positions Determined by Mark III VLBI: Observations from 1979 to 1988 and a Tie to the FK5" Astron. J. 99, 1284, 1990. C. Ma. "Realization of an Inertial Reference Frame from Mark III VLBI" in Inertial Coordinate System on the Sky, IAU Symp. 141, J.H. Lieske and V.K. Abalakin ed., 271, Kluwer, Dordrecht, 1990. C. Ma, J.W. Ryan, D.S. Caprette. "Earth Orientation Parameters with Estimated Site Velocities from the NASA Crustal Dynamics Project" in IERS Technical Note 5, IERS, 1, Observatoire de Paris, 1990. C. Ma, J.W. Ryan, D.S. Caprette. "Fixed Station and Mobile Site Position Results with Estimated Site Velocities from the NASA Crustal Dynamics Project" in IERS Technical Note 5, IERS, 5, Observatoire de Paris, 1990.
1989	C. Ma. "Extragalactic Reference Frames" in Reference Frames in Astronomy and Geophysics, J. Kovalevsky, I. I. Mueller and B. Kolaczek ed., Kluwer, Dordrecht, 1989. C. Ma, J.W. Ryan, D. Caprette. "Crustal Dynamics Project Data Analysis ? 1988, VLBI Geodetic Results 1979?87" NASA TM-100723, 1989. C. Ma, W. Himwich, D.S. Caprette. "Earth and Sky Orientation Results from the NASA Crustal Dynamics Project" in IERS Technical Note 2, IERS, 1, Observatoire de Paris, 1989. C. Ma, W. Himwich, D.S. Caprette. "Earth and Sky Orientation Results from the NASA Crustal Dynamics Project with Site Velocities Adjusted" in IERS Technical Note 2, IERS, 5, Observatoire de Paris, 1989. C. Ma, W. Himwich, D.S. Caprette. "Fixed and Mobile Position Results from the NASA Crustal Dynamics Project with Site Velocities Adjusted" in IERS Technical Note 2, IERS, 9, Observatoire de Paris, 1989.
1988	C. Ma, D. B. Shaffer. "The Celestial Reference Frame Defined by VLBI" in The Impact of VLBI on Astrophysics and Geophysics, IAU Symp. 129, M. J. Reid and J. M. Moran ed., 325, Kluwer, Dordrecht, 1988. C. Ma. "The Celestial Reference Frame of the NASA Crustal Dynamics Project" in The Earth's Rotation and Reference Frames for Geodesy and Geodynamics, IAU Symp. 128, A. K. Babcock and G. A. Wilkins ed., 73, Kluwer, Dordrecht, 1988.
1987	T. A. Clark, D. Gordon, W. E. Himwich, C. Ma, A. Mallama, J. W. Ryan. "Determination of Relative Site Motions in the Western United States Using Mark III VLBI", J. Geophys. Res. 92, 12741, 1987. J. W. Ryan, C. Ma. "Crustal Dynamics Project Data Analysis 1987: Vol. 1 ? Fixed Station VLBI Geodetic Results 1979?86" NASA TM-100682, 1987. C. Ma, J. W. Ryan. "Crustal Dynamics Project Data Analysis 1987: Vol. 2 ? Mobile Site VLBI Geodetic Results 1979?86" NASA TM-100689, 1987. C. Ma, J. W. Ryan. "Crustal Dynamics Project Data Analysis 1986: Vol. 1 Fixed Station VLBI Geodetic Results" NASA TM-87806, 1987.
1986	C. Ma, T. A. Clark, J. W. Ryan, T. A. Herring, I. I. Shapiro, B. E. Corey, H. F. Hinteregger, A. E. E. Rogers, A. R. Whitney, C. A. Knight, G. L. Lundqvist, D. B. Shaffer, N. R. Vandenberg, J C Pigg, B. R. Schupler, B. O. Ronnang. "Radio Source Positions from VLBI", Astron J. 92, 1020, 1986. J. W. Ryan, T. A. Clark, R. J. Coates, C. Ma, W. T. Wildes, C. R. Gwinn, T. A. Herring, I. I. Shapiro, B. E. Corey, C. C. Counselman, H. F. Hinteregger, A. E. E. Rogers, A. R. Whitney, C. A. Knight, N. R. Vandenberg, J C Pigg, B. R. Schupler, B. O. Ronnang. "Geodesy by Radio Interferometry: Determinations of Baseline Vector, Earth Rotation, and Solid Earth Tide Parameters with the Mark I VLBI System", J. Geophys. Res. 91, 1935, 1986. C. Ma. "The Precision of J2000.0 Radio Source Positions from Mark III VLBI" in Astrometric Techniques, H. K. Eichhorn and R. J. Leacock ed., 157, Reidel, Dordrecht, 1986. T. Herring, I. Shapiro, T. Clark, C. Ma, J. Ryan, B. Schupler, C. Knight, G. Lundqvist, D. Shaffer, N. Vandenberg, B. Corey, H. Hinteregger, A. Rogers, J. Webber, A. Whitney, G. Elgered, B. Ronnang, J. Davis. "Geodesy by Radio Interferometry: Evidence for Contemporary Plate Motion", J. Geophys. Res. 91, 8341, 1986.
1985	T.A. Clark, B. Corey, J. Davis, G. Elgered, T. Herring, H. Hinteregger, C. Knight, J. Levine, G. Lundqvist, C. Ma, E. Nesman, R. Phillips, A. Rogers, B Ronnang, J. Ryan, B. Schupler, D. Shaffer, I. Shapiro, N. Vandenberg, J. Webber. "Precision Geodesy Using the Mark-III Very-Long-Baseline Interferometer System" IEEE Trans. Geosci. Remote Sensing GE23, 438, 1985. J. W. Ryan, C. Ma. "Crustal Dynamics Project Data Analysis -- Fixed Station VLBI Geodetic Results", NASA TM-86229, 1985.
1983	A. E. E. Rogers, H. F. Hinteregger, J. I. Levine, E. F. Nesman, A. R. Whitney, T. A. Clark, C. Ma, J. W. Ryan, B. E. Corey, C. C. Counselman, T. A. Herring, I. I. Shapiro, C. A. Knight, D. B. Shaffer, N. R. Vandenberg, R. Lacasse, R. Mauzy, B. Rayhrer, B. R. Schupler, J. C. Pigg. "Very Long Baseline Interferometry: The Mark?III System for Geodesy, Astrometry and Aperture Synthesis", Science 219, 51, 1983. T. A. Herring, B. E. Corey, C. C. Counselman, I. I. Shapiro, A. E. E. Rogers, A. R. Whitney, T. A. Clark, C. A. Knight, C. Ma, J. W. Ryan, B. R. Schupler, N. R. Vandenberg, G. Elgered, G. Lundqvist, B. O. Ronnang, J. Campbell, P. Richards. "Determination of Tidal Parameters from VLBI Observations" in Proc. Ninth International Symposium on Earth Tides, New York City Aug. 17?22, 1981, J. T. Kuo ed., 205?214, E. Schweizerdart'sche Verlagsbuchhandlung, Stuttgart, 1983.
1982	T. A. Clark, C. A. Knight, C. Ma, J. W. Ryan, B. R. Schupler, D. B. Shaffer, N. R. Vandenberg, B. E. Corey, C. C. Counselman, T. A. Herring, I. I. Shapiro, A. E. E. Rogers and A. R. Whitney. "Earth Rotation from VLBI during the MERIT Short Campaign" BIH 1981 Annual Report.
1981	C. Ma. "Geodesy by Radio Interferometry: Polar Motion and UT1 from MERIT" Eos 62, 260, 1981. T. A. Herring, B. E. Corey, C. C. Counselman, I. I. Shapiro, B. Ronnang, O. Rydbeck, T. A. Clark, R. J. Coates, C. Ma, J. W. Ryan, N. R. Vandenberg, H. F. Hinteregger, C. A. Knight, A. E. E. Rogers, A. R. Whitney, D. S. Robertson, B. R. Schupler. "Geodesy by Radio Interferometry: Intercontinental Distance Determinations with Subdecimeter Precision", J. Geophys. Res. 86, B3, 1647, 1981.
1980	C. Ma. "North American Baselines and UT1 Measured with VLBI" Eos 61, 939, 1980. J. W. Ryan, C. Ma, N. R. Vandenberg. "The Mark III VLBI Data Analysis System" Goddard X?945?80?25, 1980. C. Ma. "The Effect of Corrections to Nutation on Astrometric VLBI" Bull. Amer. Astro. Soc. 12, 742, 1980. C. Ma. "Extragalactic Radio Source Positions Determined with VLBI" Bull. Amer. Astro. Soc. 12, 489, 1980. C. Ma. "Trans? and Interplate Baseline Measurements Using VLBI" Eos 61, 212, 1980. D.S. Robertson, T.A. Clark, R.J. Coates, C. Ma, J.W. Ryan, B.E. Corey, C.C. Counselman, R.W. King, I.I. Shapiro, H.F. Hinteregger, C. A. Knight, A.E.E. Rogers, A.R. Whitney, JC Pigg, B.R. Schupler. "Polar Motion and UT1: Comparison of VLBI, Lunar Laser, SatelliteLaser, Satellite Doppler, and Conventional Astrometric Determinations" in Radio Interferometry ? Techniques for Geodesy, NASA Con. Pub. 2115, 1980. J. W. Ryan, C. Ma, B. R. Schupler. "The Mark III Data Base Handler" in Radio Interferometry Techniques for Geodesy, NASA Con. Pub. 2115, 1980. J. W. Ryan, C. Ma, B. R. Schupler. "Mark III Interactive Data Analysis System" in Radio Interferometry ? Techniques for Geodesy, NASA Con. Pub. 2115, 1980. C. Ma, J. W. Ryan, B. R. Schupler. "Geophysical and Astronomical Models Applied in the Analysis of Very Long Baseline Interferometry" in Radio Interferometry ? Techniques for Geodesy, NASA Con. Pub.2115,1980.
1979	D. S. Robertson, W. E. Carter, B. E. Corey, W. D. Cotton, C. C. Counselman, I. I. Shapiro, J. J. Wittels, H. F. Hinteregger, C. A. Knight, A. E. E. Rogers, A. R. Whitney, J. W. Ryan, T. A. Clark, R. J. Coates, C. Ma, J. M. Moran. "Recent Results of Radio Interferometric Determinations of a Transcontinental Baseline, Polar Motion, and Earth Rotation" in Time and the Earth's Rotation, D. D. McCarthy and J. D. Pilkington ed., 217, Reidel 1979.
1978	J. W. Ryan, C. Ma. "A Small Data Base Handler for Scientific Applications" Proc. 2nd Working Conference on Oceanographic Data Systems, 330, 1978. J. W. Ryan, T. A. Clark, R. Coates, C. Ma, D. S. Robertson, B. E. Corey, C. C. Counselman, I. I. Shapiro, J. J. Wittels, H. F. Hinteregger, C. A. Knight, A. E. E. Rogers, A. R. Whitney, J. M. Moran. "Precision Surveying Using Radiointerferometry" J. of the Surveying and Mapping Div. Amer. Soc. Civil Engineers 104, No. SU1, 25, 1978. J. J. Wittels, I. I. Shapiro, H. F. Hinteregger, C. A. Knight, A. E. E. Rogers, A. R. Whitney, T. A. Clark, C. Ma, L. K. Hutton, D. S. Robertson, B. O. Ronnang, O. E. H. Rydbeck, A. E. Niell, G. M. Resch. "A High Declination Search at 8 GHz for Compact Radio Sources" Astron. J. 83(6), 560, 1978. C. Ma. "Very Long Baseline Interferometry Applied to Polar Motion, Relativity, and Geodesy" NASA TM79582, 1978.
1976	T. A. Clark, L. K. Hutton, C. Ma, I. I. Shapiro, J. J. Wittels, D. S. Robertson, H. F. Hinteregger, C. A. Knight, A. E. E. Rogers, A. R. Whitney, A. E. Niell, G. M. Resch, W. J. Webster. "An Unusually Strong Radio Outburst in Algol: VLBI Observations", Astrophys. J. 206, L107, 1976.