@article{oai:nagasaki-u.repo.nii.ac.jp:00021433,
 author = {Nishihara, Toshiaki},
 issue = {2},
 journal = {長崎大学教養部紀要. 人文科学篇},
 month = {Jan},
 note = {長崎大学教養部紀要. 人文科学篇. 1993, 33(2), p.65-80},
 pages = {65--80},
 title = {Some Remarks on the NP First Property},
 volume = {33},
 year = {1993}
}