%0 Journal Article
%A A. Shapiro
%A J. H. Whitehead
%T A proof and extension of Dehn's lemma
%J Matematika
%D 1960
%P 9-14
%V 4
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MAT_1960_4_1_a1/
%G ru
%F MAT_1960_4_1_a1