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@article{DAN_1988_302_5_a2, author = {G. A. Gal'perin}, title = {The concept of the center of mass of a system of mass points in}, journal = {Doklady Akademii Nauk}, pages = {1039--1044}, publisher = {mathdoc}, volume = {302}, number = {5}, year = {1988}, language = {ru}, url = {http://geodesic.mathdoc.fr/item/DAN_1988_302_5_a2/} }
G. A. Gal'perin. The concept of the center of mass of a system of mass points in. Doklady Akademii Nauk, Tome 302 (1988) no. 5, pp. 1039-1044. http://geodesic.mathdoc.fr/item/DAN_1988_302_5_a2/