%0 Journal Article %A He, Yong %A Shao, Fang %A Li, Shi-qun %A Gao, Wei %T On left $C$-$\scr U$-liberal semigroups %J Czechoslovak Mathematical Journal %D 2006 %P 1085-1108 %V 56 %N 4 %I mathdoc %U https://geodesic-test.mathdoc.fr/item/CMJ_2006__56_4_a1/ %G en %F CMJ_2006__56_4_a1