@article{05933971,
title = {Toughness of },
journal = {The Electronic Journal of Combinatorics [electronic only]},
volume = {18},
year = {2011},
zbl = {1222.05239},
language = {en},
url = {http://dml.mathdoc.fr/item/05933971}
}
Chen, Guantao; Egawa, Yoshimi; Kawarabayashi, Ken-ichi; Mohar, Bojan; Ota, Katsuhiro. Toughness of . The Electronic Journal of Combinatorics [electronic only], Tome 18 (2011) . http://gdmltest.u-ga.fr/item/05933971/