%0 Journal Article
%A Chajda, Ivan
%A Länger, Helmut
%T Groupoids assigned to relational systems
%J Mathematica Bohemica
%D 2013
%P 15-23
%V 138
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.21136/MB.2013.143226/
%R 10.21136/MB.2013.143226
%G en
%F 10_21136_MB_2013_143226