@article{oai:niigata-u.repo.nii.ac.jp:00002195, author = {Watanabe, Keiichi}, issue = {1}, journal = {Nihonkai Mathematical Journal, Nihonkai Mathematical Journal}, month = {Jun}, pages = {121--125}, title = {Shifts with two generators on the hyperfinite II1-factor}, volume = {1}, year = {1990} }