%0 Journal Article
%A Goralčík, P.
%A Goralčíková, A.
%A Koubek, V.
%T How much semigroup structure is needed to encode graphs ?
%J RAIRO - Theoretical Informatics and Applications - Informatique Théorique et Applications
%D 1986
%P 191-206
%V 20
%N 2
%I AFCET - Gauthier-Villars
%C Paris
%U http://archive.numdam.org/item/ITA_1986__20_2_191_0/
%G en
%F ITA_1986__20_2_191_0