%0 Journal Article
%A G. P. Egorychev
%A Yu. D. Ushakov
%T The ranks of the $p$-central series of free groups of certain manifolds
%J Matematičeskie zametki
%D 1977
%P 575-582
%V 22
%N 4
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MZM_1977_22_4_a13/
%G ru
%F MZM_1977_22_4_a13