Tarakanov, Y.A. and Karagios, O.V. 2012. The inverse problem of the gravitational field of planets as a physical problem. Geofizicheskiy Zhurnal. 34, 1 (Feb. 2012), 32–49. DOI:https://doi.org/10.24028/gzh.0203-3100.v34i1.2012.116576.