TY  - JOUR
AU  - Wilce, Alexander
TI  - Perspectivity and congruence in partial abelian semigroups
JO  - Mathematica slovaca
PY  - 1998
SP  - 117
EP  - 135
VL  - 48
IS  - 2
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/MASLO_1998__48_2_a1/
LA  - en
ID  - MASLO_1998__48_2_a1
ER  -