@article{oai:repository.dl.itc.u-tokyo.ac.jp:00039530, author = {Isozaki, Hiroshi and Kitada, Hitoshi}, 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 = {77--104}, title = {Modified wave operators with time-independent modifiers}, volume = {32}, year = {1985} }