%0 Journal Article
%A Romano Daniel Avraám
%T Some theorems about 

 constructions of a-coideals on the cartesian product of sets
%J Novi Sad Journal of Mathematics
%D 1992
%P 111-118
%V 22
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/NSJOM_1992_22_1a_10/
%F NSJOM_1992_22_1a_10