@article{DAN_1962_142_5_a22,
     author = {V. A. Chikin},
     title = {A generalization of a theorem of {Huygens}},
     journal = {Doklady Akademii Nauk},
     pages = {1058--1060},
     publisher = {mathdoc},
     volume = {142},
     number = {5},
     year = {1962},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1962_142_5_a22/}
}