%0 Journal Article
%A Knast, Robert
%T Some theorems on graph congruences
%J RAIRO. Informatique théorique
%D 1983
%P 331-342
%V 17
%N 4
%I EDP-Sciences
%U http://www.numdam.org/item/ITA_1983__17_4_331_0/
%G en
%F ITA_1983__17_4_331_0