@article{oai:tsukuba.repo.nii.ac.jp:00018586,
 author = {Wang, Shuan-hong},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Dec},
 pages = {377--388},
 title = {A Maschke type theorem for Hopf π-comodules},
 volume = {28},
 year = {2004}
}