@article{CMJ_2010__60_4_a16,
     author = {Liu, BoLian and Chen, Siyuan},
     title = {Algebraic conditions for $t$-tough graphs},
     journal = {Czechoslovak Mathematical Journal},
     pages = {1079--1089},
     publisher = {mathdoc},
     volume = {60},
     number = {4},
     year = {2010},
     mrnumber = {2738970},
     zbl = {1224.05307},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2010__60_4_a16/}
}