@article{oai:cuc.repo.nii.ac.jp:00004925,
 author = {内海, 幸久 and ウツミ, ユキヒサ and UTSUMI, Yukihisa},
 issue = {1},
 journal = {千葉商大論叢},
 month = {Sep},
 note = {P(論文)},
 pages = {85--90},
 title = {A β-core of Incomplete Information Games},
 volume = {50},
 year = {2012}
}