%0 Journal Article %A Yang, Yulong %A Zhu, Guangjun %A Cui, Yijun %A Duan, Shiya %T The $\circ $ operation and $*$ operation of Cohen-Macaulay bipartite graphs %J Czechoslovak Mathematical Journal %D 2024 %P 735-757 %V 74 %N 3 %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.2024.0438-23/ %R 10.21136/CMJ.2024.0438-23 %G en %F 10_21136_CMJ_2024_0438_23