@article{oai:repository.dl.itc.u-tokyo.ac.jp:00037815,
 author = {Nakagawa, S.},
 journal = {The journal of the College of Science, Imperial University of Tokyo, Japan = 東京帝國大學紀要. 理科},
 month = {Aug},
 pages = {1--68},
 title = {Miscellen aus dem Gebiete der Hyperbolischen Geometrie},
 volume = {27},
 year = {1910}
}