TY  - JOUR
AU  - Romano Daniel Avraám
TI  - Some theorems about 

 constructions of a-coideals on the cartesian product of sets
JO  - Novi Sad Journal of Mathematics
PY  - 1992
SP  - 111
EP  - 118
VL  - 22
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/NSJOM_1992_22_1a_10/
ID  - NSJOM_1992_22_1a_10
ER  -