@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/