%0 Journal Article %A V. M. Volosov %T Periodical solutions of a non-linear equation of autooscillations %J Doklady Akademii Nauk %D 1957 %P 20-22 %V 115 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1957_115_1_a3/ %G ru %F DAN_1957_115_1_a3