%0 Journal Article
%A Volenec, Vladimir
%T Subtractive groupoids and laterally commutative heaps
%J Portugaliae mathematica
%D 1990
%P 43-45
%V 47
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/PORMA_1990__47_1_115699/
%G en
%F PORMA_1990__47_1_115699