@article{02220871, title = {The }, journal = {The Electronic Journal of Combinatorics [electronic only]}, volume = {12}, year = {2005}, zbl = {1085.52009}, language = {en}, url = {http://dml.mathdoc.fr/item/02220871} }
Ohsugi, Hidefumi; Hibi, Takayuki. The . The Electronic Journal of Combinatorics [electronic only], Tome 12 (2005) . http://gdmltest.u-ga.fr/item/02220871/