%0 Journal Article %A Zelinka, Bohdan %T Natural bijections between directed and undirected self-complementary graphs %J Mathematica slovaca %D 1987 %P 363-366 %V 37 %N 4 %I mathdoc %U http://geodesic.mathdoc.fr/item/MASLO_1987__37_4_a5/ %G en %F MASLO_1987__37_4_a5