%0 Journal Article
%A Rachůnek, Jiří
%T Categories of systems of $X$-relations
%J Archivum mathematicum
%D 1980
%P 175-184
%V 16
%N 3
%I mathdoc
%U http://geodesic.mathdoc.fr/item/ARM_1980__16_3_a5/
%G en
%F ARM_1980__16_3_a5