%0 Journal Article %A Pu, Liqun %A Tang, Yuan %A Gao, Xiaoli %T Packing four copies of a tree into a complete bipartite graph %J Czechoslovak Mathematical Journal %D 2022 %P 39-57 %V 72 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.21136/CMJ.2021.0249-20/ %R 10.21136/CMJ.2021.0249-20 %G en %F 10_21136_CMJ_2021_0249_20