@article{oai:repository.dl.itc.u-tokyo.ac.jp:00039646, author = {Saito, Kyoji}, issue = {2}, 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 = {Aug}, note = {application/pdf}, pages = {265--291}, title = {Theory of logarithmic differential forms and logarithmic vector fields}, volume = {27}, year = {1980} }