Johnston, K. J., Spencer, J. H., Mayer, C. H., Klepczynski, W. J., Kaplan, G. H., McCarthy, D. D., and Westerhout, G. (1979). "The NAVOBSY/NRL Program for the Determination of Earth Rotation and Polar Motion", in Time and the Earth's Rotation, IAU Symposium 82, edited by D. D. McCarthy and J. D. H. Pilkington (D. Reidel, Dordrecht, Holland), pp. 211-215.

Kaplan, G. H., Kallarakal, V. V., Harrington, R. S., Johnston, K. J., and Spencer, J. H. (1980). "The Coincidence of the Radio and Optical Emission from SS433", Astron. J. 85, 64-65.

Seidelmann, P. K., Kaplan, G. H., Pulkkinen, K. F., Santoro, E. J., and Van Flandern, T. C. (1980). "Ephemeris of Pluto", Icarus 44, 19-28.

Johnston, K. J., Santini, N. J., Spencer, J. H., Klepczynski, W. J., Kaplan, G. H., Josties, F. J., Angerhofer, P. E., Florkowski, D. R., and Matsakis, D. N. (1981). "11.1- and 3.7-cm Variations in the Flux Density of SS 433", Astron. J. 86, 1377-1383.

Kaplan, G. H. (1981). "Nutation Data from Radio Interferometer Observations", in Proceedings of the Ninth International Symposium on Earth Tides, (E. Schweizerbart'sche Verlagsbuchhandlung, Stuugart), pp. 519-526.

Kaplan, G. H., editor (1981). "The IAU Resolutions on Astronomical Constants, Time Scales, and the Fundamental Reference Frame", U.S. Naval Observatory Circular No. 163.

Seidelmann, P. K., Kaplan, G. H., and Van Flandern, T. C. (1981). "New Celestial Reference System", in Reference Coordinate Systems for Earth Dynamics, IAU Colloquium 56, edited by E. M. Gaposchkin and B. Kolazek (D. Reidel, Dordrecht, Holland), pp. 305-316.

Aoki, S., Guinot, B., Kaplan, G. H., Kinoshita, H., McCarthy, D. D., and Seidelmann, P. K. (1982). "The New Definition of Universal Time", Astron. Astrophys. 105, 359-361.

Kaplan, G. H. (1982). "The Earth's Nutational Motion Determined from Radio Interferometry", Bull. AAS 14, 658.

Kaplan, G. H., Josties, F. J., Angerhofer, P. E., Johnston, K. J., and Spencer, J. H. (1982). "Precise Radio Source Positions from Interferometric Observations", Astron. J. 87, 570-576.

Seidelmann, P. K., Kaplan, G. H., Johnston, J. H., and Wade, C. M. (1984). "Observations of Minor Planets with the Very Large Array", Celest. Mech. 34, 39-48.

Kaplan, G. H. (1985). "The Earth's Nutational Motion Determined from Radio Interferometry", Ph.D. dissertation, University of Maryland (College Park, Md.).

Kaplan, G. H., Carroll, T. S., Doggett, L. E., Seidelmann, P. K., and Deustua, S. E. (1986). "A 'Floppy Almanac'", Bull. AAS 18, 664-665.

Shao, M., Colavita, M. M., Hines, B. E., Staelin, D. H., Hutter, D. J., Johnston, K. J., Mozurkewich, D., Simon, R. S., Hershey, J. L., Hughes, J. A., and Kaplan, G. H. (1988). "The Mark III Stellar Interferometer", Astron. Astrophys. 193, 357-371.

Webster, W. J., Jr., Johnston, K. J., Hobbs, R. W., Lamphear, E. S., Wade, C. M., Lowman, P. D., Jr., Kaplan, G. H., and Seidelmann, P. K. (1988). "The Microwave Spectrum of Asteroid Ceres", Astron. J. 95, 1263-1268.

Mozurkewich, D., Hutter, D. J., Johnston, K. J., Simon, R. S., Shao, M., Colavita, M. M., Staelin, D. H., Hines, B. E., Hershey, J. L., Hughes, J. A., and Kaplan, G. H. (1988). "Preliminary Measurements of Star Positions with the Mark III Stellar Interferometer", Astron. J. 95, 1269-1277.

Shao, M., Colavita, M. M., Hines, B. E., Staelin, D. H., Hutter, D. J., Johnston, K. J., Mozurkewich, D., Simon, R. S., Hershey, J. L., Hughes, J. A., and Kaplan, G. H. (1988). "Initial Stellar Diameter Measurements with the Mark III Interferometer", Astrophys. J. 327, 905-910.

Kaplan, G. H., Hershey, J. L., Hughes, J. A., Hutter, D. J., Johnston, K. J., Mozurkewich, D., Simon, R. S., Colavita, M. M., Shao, M., Hines, B. E., and Staelin, D. H. (1988). "Astrometric Capabilities of the Mt. Wilson Mark III Optical Interferometer", in High-Resolution Imaging by Interferometry, edited by F. Merkle (European Southern Observatory, Garching, Federal Republic of Germany), pp. 841-849.

Smith, C. A., Kaplan, G. H., Hughes, J. A., Seidelmann, P. K., Yallop, B. D., and Hohenkerk, C. Y. (1989). "Mean and Apparent Place Computations in the New IAU System. I. The Transformation of Astrometric Catalog Systems to the Equinox J2000.0", Astron. J. 97, 265-273.

Yallop, B. D., Hohenkerk, C. Y., Smith, C. A., Kaplan, G. H., Hughes, J. A., and Seidelmann, P. K. (1989). "Mean and Apparent Place Computations in the New IAU System. II. Transformation of Mean Star Places from FK4 B1950.0 to FK5 J2000.0 Using Matrices in 6-Space", Astron. J. 97, 274-279.

Kaplan, G. H., Hughes, J. A., Seidelmann, P. K., Smith, C. A., and Yallop, B. D. (1989). "Mean and Apparent Place Computations in the New IAU System. III. Apparent, Topocentric, and Astrometric Places of Planets and Stars", Astron. J. 97, 1197-1210.

Hutter, D. J., Johnston, K. J., Mozurkewich, D., Simon, R. S., Colavita, M. M., Pan, X. P., Shao, M., Hines, B. E., Staelin, D. H., Hershey, J. L., Hughes, J. A., and Kaplan, G. H. (1989). "Angular Diameter Measurements of 24 Giant and Supergiant Stars from the Mark III Optical Interferometer", Astrophys. J. 340, 1103-1111.

Johnston, K. J., Lamphear, E. S., Webster, W. J., Jr., Lowman, P. D., Jr., Seidelmann, P. K., Kaplan, G. H., Wade, C. M., and Hobbs, R. W. (1989). "The Microwave Spectrum of the Asteroids Pallas, Vesta, and Hygiea", Astron. J. 98, 335-340.

Kaplan, G. H. (1990). "NOVAS", Bull. AAS 22, 930-931.

Shao, M., Colavita, M. M., Hines, B. E., Hershey, J. L., Hughes, J. A., Hutter, D. J., Kaplan, G. H., Johnston, K. J., Mozurkewich, D., Simon, R. S., and Pan, X. P. (1990). "Wide Angle Astrometry with the Mark III Stellar Interferometer", Astron. J. 100, 1701-1711.

Kaplan, G. H. (1990). "Astrometric Interferometry - Can It Establish a Fundamental System?", in Inertial Coordinate System on the Sky, IAU Symposium 141, edited by J. H. Lieske and V. K. Abalakin (Kluwer, Dordrecht, Holland), pp. 241-250.

Hughes, J. A., Smith, C. A., and Kaplan, G. H., editors (1991). Reference Systems, Proceedings of IAU Colloquium 127 (U.S. Naval Observatory, Washington).

Hughes, J. A., Kaplan, G. H., and Shao, M. (1991). "Design Considerations for the USNO Optical Interferometer", Astrophys. & Space Science 177, 151-159.

Bangert, J. A., and Kaplan, G. H. (1992). "MICA: A High-Precision Almanac for Small Computers", Bull. AAS 24, 740.

Kaplan, G. H. (1995). "Report of the IAU WGAS Sub-Group on Electronic Distribution", Highlights of Astronomy 10, 190-192.

Kaplan, G. H. (1995). "Practical Sailing Formulas for Rhumb-Line Tracks on an Oblate Earth", Navigation 42, (No. 2), 313-326.

Kaplan, G. H. (1995). "Determining the Position and Motion of a Vessel from Celestial Observations", Navigation 42 (No. 4), 631- 648.

Kaplan, G. H. (1996). "A Navigation Solution Involving Changes to Course and Speed", Navigation 43 (No. 4), 469-482.

Kaplan, G. H. (1997). "A Comparison of Radio and Optical Astrometric Reduction Algorithms", Bull. AAS 29, 789.

Bangert, J. A., Fiala, A. D., and Kaplan, G. H. (1997). "Future Directions in Almanac Products from the U.S. Naval Observatory", Bull. AAS 29, 1236.

Kaplan, G. H. (1998). "High-Precision Algorithms for Astrometry: A Comparison of Two Approaches", Astron. J. 115, 361-372.

Kaplan, G. H. (1999). "New Technology for Celestial Navigation", in Proceedings, Nautical Almanac Office Sesquicentennial Symposium, edited by A. D. Fiala and S. J. Dick (U.S. Naval Observatory, Washington), pp. 239-254.

Mason, B. D., Kaplan, G. H., Douglass, G. G., Pascu, D., and Aksnes, K. (1999). "Close Pairings of Galilean Satellites Observed Using Speckle Interferometry", Bull. AAS 31, 1225.

Johnston, K. J., McCarthy, D. D., Luzum, B. J., and Kaplan, G. H., editors (2000). Towards Models and Constants for Sub-Microarcseceond Astrometry, Proceedings of IAU Colloquium 180 (U.S. Naval Observatory, Washington).

Kaplan, G. H., and Snell, S. C. (2001). "An Independent Assessment of a Subset of Hipparcos and Tycho-2 Proper Motions", Bull. AAS 33, 1493-1494.

Kaplan, G. H., and Janiczek, P. M. (2001). "Comments on 'The Method of Co-Planar Vertices for Astronomical Positioning: Present Applications and Future Extensions'", Navigation 48 (No. 3), 205-206.

Kaplan, G. H., and Makarov, V. V. (2003). "Astrometric Detection of Binary Companions and Planets: Acceleration of Proper Motion", Astron. Nach. 324, 419-424.

Kaplan, G. H. (2003). "Another Look at Non-Rotating Origins", in The International Celestial Reference System, Maintenance and Future Realizations, IAU General Assembly XXV Joint Discussion 16, edited by R. Gaume, D. McCarthy, and J. Souchay (U.S. Naval Observatory, Washington), pp. 196-199.   Also Highlights of Astronomy 13, 612-613.

Makarov, V. V. and Kaplan, G. H. (2005). "Statistical Constraints for Astrometric Binaries with Nonlinear Motion", Astron. J. 129, 2420-2427.

Kaplan, G. H. (2005). "The IAU Resolutions on Astronomical Reference Systems, Time Scales, and Earth Rotation Models", U.S. Naval Observatory Circular No. 179.    (PDF)

Urban, S. E., Bell, S., Kaplan, G. H., Hohenkerk, C. Y., Stewart, S. G., Bangert, J. A., and Hilton, J. L. (2005). "The Astronomical Almanac 2006: Changes Resulting from IAU Resolutions", Bull. AAS 37, 1200.

Kaplan, G. H. and Bangert, J. A. (2006). "Tools for Implementing the Recent IAU Resolutions: USNO Circular 179 and the NOVAS Software Package", Highlights of Astronomy 14, 460.

Kaplan, G. H., Bangert, J., Bartlett, J. L., Puatua, W., and Monet, A. (2010). "Naval Observatory Vector Astrometry Software (NOVAS) Version 3.0", Bull. AAS 42, 523 (#475.04).

Kaplan, G. H. (2011). "Angles-Only Navigation: Position and Velocity Solution from Absolute Triangulation", Navigation 58 (No. 3), 187-201.

Kopeikin, S., Efroimsky, M., and Kaplan, G. (2011). Relativistic Celestial Mechanics of the Solar System (Wiley-VCH, Weinheim, Germany).

Kaplan, G. H. (2011). "Time Scales in Astronomical and Navigational Almanacs", in Decoupling Civil Timekeeping from Earth Rotation, edited by J. H. Seago, R. L. Seaman, and S. L. Allen (Univelt, San Diego), American Astronautical Society Science and Technology Series Vol. 113, pp. 201-209.

Kaplan, G. H. (2015). "Coordinate System Issues in Binary Star Computations", IAU General Assembly, Aug. 2015, Division A poster 1.05, ID 2255042.    (PDF)

Malys, S., Seago, J. H., Pavlis, N. K., Seidelmann, P. K., and Kaplan, G. H. (2015). "Why the Greenwich Meridian Moved", J. of Geodesy 89 (No. 12), 1263-1272.    (open access version)

Malys, S., Seago, J. H., Pavlis, N. K., Seidelmann, P. K., and Kaplan, G. H. (2016). "Prime Meridian on the Move", GPS World 27, No. 1, 44-45.    (online version)

Hohenkerk, C., Arlot, J.-E., Kaplan, G., Bangert, J. A., Bell, S. A., Ferrandiz, J. M., Fienga, A., Folkner, W., Lukashova, M., Pitjeva, E. V., Soma, M., Thuillot, W., and Urban, S. E. (2016). "Historical Reflections on the Work of Commission 4", edited by G. H. Kaplan, Trans. IAU, 29A, 1-21.    (arXiv version)

Kaplan, G. H. (2020). "Fix Probabilities from LOP Geometry", Journal of Navigation 73 (No. 3), 697-709, DOI: 10.1017/S0373463319000912.    (online version)

Hilton, J., Hennessy, G., Kaplan, G., Markarov, V. (2023). "A Proposal for Using Long Baseline Interferometer Observations to Improve Lunar Ephemerides", Bull. AAS, 55(2).    online abstract