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@article{RCM_1988__22_1-4_181818, author = {Damut Marcu}, title = {An {Exchange} {Property} {For} {The} {Submodular} {Systems.}}, journal = {Revista colombiana de matematicas}, pages = {209--212}, publisher = {mathdoc}, volume = {22}, number = {1-4}, year = {1988}, zbl = {0717.05024}, url = {http://geodesic.mathdoc.fr/item/RCM_1988__22_1-4_181818/} }
Damut Marcu. An Exchange Property For The Submodular Systems.. Revista colombiana de matematicas, Tome 22 (1988) no. 1-4, pp. 209-212. http://geodesic.mathdoc.fr/item/RCM_1988__22_1-4_181818/