@article{DAN_1977_234_5_a6,
     author = {R. P. Kuzmina},
     title = {On an upper estimate for the number of central configurations in the planar $n$-body problem},
     journal = {Doklady Akademii Nauk},
     pages = {1016--1019},
     publisher = {mathdoc},
     volume = {234},
     number = {5},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_234_5_a6/}
}