@article{oai:repository.dl.itc.u-tokyo.ac.jp:00039544, author = {Masuda, Mikiya}, issue = {1}, journal = {Journal of the Faculty of Science, the University of Tokyo. Sect. 1 A, Mathematics = 東京大学理学部紀要. 第1類A, 数学}, month = {Mar}, note = {application/pdf}, pages = {1--31}, title = {$S\sp{1}$-actions on twisted $C{\rm P}\sp{3}$}, volume = {31}, year = {1984} }