%0 Journal Article %A V. M. Grigorevskii %T Rapid variations of the rotation period of the second Soviet artificial earth satellite with respect to the transverse axis %J Doklady Akademii Nauk %D 1961 %P 572-575 %V 137 %N 3 %I mathdoc %U http://geodesic.mathdoc.fr/item/DAN_1961_137_3_a18/ %G ru %F DAN_1961_137_3_a18