@article{oai:tohoku.repo.nii.ac.jp:00129886,
 author = {島, 越郎},
 journal = {東北大学文学研究科研究年報, The Annual Reports of Graduate School of Arts and Letters Tohoku University},
 month = {Mar},
 note = {紀要類（bulletin）},
 pages = {80--54},
 title = {潜在項としてのPRO},
 volume = {69},
 year = {2020}
}