TY  - JOUR
AU  - Damut Marcu
TI  - An Exchange Property For The Submodular Systems.
JO  - Revista colombiana de matematicas
PY  - 1988
SP  - 209
EP  - 212
VL  - 22
IS  - 1-4
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/item/RCM_1988__22_1-4_181818/
ID  - RCM_1988__22_1-4_181818
ER  -