@article{oai:niigata-u.repo.nii.ac.jp:00002107,
 author = {Goto, Shiro and Watanabe, Keiichi},
 issue = {2},
 journal = {Journal of the Mathematical Society of Japan, Journal of the Mathematical Society of Japan},
 month = {},
 pages = {179--213},
 title = {On granded rings, I},
 volume = {30},
 year = {1978}
}