@article{oai:tsukuba.repo.nii.ac.jp:00029682,
 author = {Niitsuma, Yasuhiro},
 issue = {2},
 journal = {Tsukuba Journal of Mathematics},
 month = {Dec},
 pages = {437--470},
 title = {On the extensions of W_n by G^<(μ)> over a Z_<(p)> -algebra},
 volume = {29},
 year = {2005}
}