@article{oai:tsukuba.repo.nii.ac.jp:00015995,
 author = {Hirata, Kazuhiko and Yamashiro, Yasukazu},
 issue = {1},
 journal = {Tsukuba Journal of Mathematics},
 month = {Jun},
 pages = {77--84},
 title = {Ring extensions and endomorphism rings of a module},
 volume = {17},
 year = {1993}
}