%0 Journal Article
%A Haviar, Alfonz
%A Monoszová, Gabriela
%T On varieties of orgraphs
%J Discussiones Mathematicae. Graph Theory
%D 2001
%P 207-221
%V 21
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/item/DMGT_2001_21_2_a5/
%G en
%F DMGT_2001_21_2_a5