%0 Journal Article
%A Behzad, Mehdi
%A Harary, Frank
%T Which directed graphs have a solution?
%J Mathematica slovaca
%D 1977
%P 37-42
%V 27
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/MASLO_1977__27_1_a4/
%G en
%F MASLO_1977__27_1_a4