@article{DAN_1961_137_6_a21,
     author = {G. I. Zel'tser},
     title = {On the determination of the total moment of a system of $n$~particles},
     journal = {Doklady Akademii Nauk},
     pages = {1339--1342},
     year = {1961},
     volume = {137},
     number = {6},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1961_137_6_a21/}
}