%0 Journal Article %A Chao, Chong-Yun %A Han, Shaocen %T On the toughness of cycle permutation graphs %J Czechoslovak Mathematical Journal %D 2001 %P 239-260 %V 51 %N 2 %I mathdoc %U http://geodesic.mathdoc.fr/item/CMJ_2001__51_2_a2/ %G en %F CMJ_2001__51_2_a2