%0 Journal Article
%A V. A. Chikin
%T A generalization of a theorem of Huygens
%J Doklady Akademii Nauk
%D 1962
%P 1058-1060
%V 142
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1962_142_5_a22/
%G ru
%F DAN_1962_142_5_a22