%0 Journal Article
%A Ahmad Shafaat
%T Boolean groupoids
%J Fundamenta Mathematicae
%D 1975
%P 117-120
%V 88
%N 2
%I mathdoc
%U http://geodesic.mathdoc.fr/articles/10.4064/fm-88-2-117-120/
%R 10.4064/fm-88-2-117-120
%G fr
%F 10_4064_fm_88_2_117_120