@article{oai:tsukuba.repo.nii.ac.jp:00019990, author = {Nakasawa, Takeo and 中澤, 武雄}, issue = {3}, journal = {Science reports of the Tokyo Bunrika Daigaku. Section A}, month = {}, pages = {205--216}, title = {Über die Abbildungskette vom Projektionsspektrum.}, year = {1938} }