%0 Journal Article
%A Włodzimierz Waliszewski
%T On a generalization of the notion of a semi-group
%J Colloquium Mathematicum
%D 1966
%P 191-194
%V 15
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/cm-15-2-191-194/
%R 10.4064/cm-15-2-191-194
%G en
%F 10_4064_cm_15_2_191_194