%0 Journal Article
%A V. A. Roman'kov
%T Primitive elements of free groups of rank~3
%J Sbornik. Mathematics
%D 1992
%P 445-454
%V 73
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/SM_1992_73_2_a7/
%G en
%F SM_1992_73_2_a7