@article{oai:repository.dl.itc.u-tokyo.ac.jp:00039747,
 author = {Kako, Takashi and Ito, S.},
 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 = {199--221},
 title = {Spectral and scattering theory for the J-selfadjoint operators associated with the perturbed Klein-Gordon type equations},
 volume = {23},
 year = {1976}
}