1. Determination of the gravity field of the Moon by the motion of Luna;Akim;Doklady Akademii Nauk USSR,1966
2. Model of the lunar gravitational field, derived from Luna 10, 12, 14, 15 and 22 tracking data;Akim;DAN SSSR,1977
3. Studies of the lunar gravitational field involving Doppler tracking of Soviet artificial satellites;Akim;Kosmicheskaya Issledovaniya,1983
4. Mean rates of the orbital elements of a satellite perturbed by a lens shaped mass concentration;Ananda;Celestial Mechanics,1975
5. Lunar gravity: a mass point model;Ananda;Journal of Geophysical Research,1977