1. E.L. Akim, Determination of the gravitational field of the Moon from the motion of the artificial lunar satellite “Lunar-10”. Dokl. Akad. Nauk SSSR 170 (1966)
2. M.P. Ananda, Lunar gravity: a mass point model. J. Geophys. Res. 82, 3040–3064 (1977)
3. S.W. Asmar et al., The scientific measurement system of the Gravity Recovery and Interior Laboratory (GRAIL) mission. Space Sci. Rev. (2012, this issue)
4. M.J. Chung, S.J. Hatch, J.A. Kangas, S.M. Long, R.B. Roncoli, T.H. Sweetser, Trans-lunar cruise trajectory design of GRAIL mission, in AIAA Astrodynamics Conf., Toronto, CA (2010)
5. C. Dunn et al., The instrument on NASA’s GRACE mission: augmentation of GPS to achieve unprecedented gravity field measurements, in Proc. 15th Int. Tech. Meeting of Satellite Division of Institute of Navigation, Portland, OR, 2002, pp. 724–730