@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/