%0 Journal Article
%A V. N. Kas'yanov
%T Distinguishing hammocks in a directed graph
%J Doklady Akademii Nauk
%D 1975
%P 1020-1022
%V 221
%N 5
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DAN_1975_221_5_a3/
%G ru
%F DAN_1975_221_5_a3