@article{oai:teapot.lib.ocha.ac.jp:00035166,
 author = {Kato, Tizuko and 加藤, 千鶴子},
 journal = {お茶の水女子大學自然科學報告},
 month = {Mar},
 note = {application/pdf, 紀要論文},
 pages = {17--21},
 title = {On Singular Points of Ordinary Differential Equations of the First Order},
 volume = {1},
 year = {1951}
}