@article{oai:teapot.lib.ocha.ac.jp:00041615,
 author = {NAKAI, Isao and NAKAI, Isao},
 issue = {1-2},
 journal = {お茶の水女子大學自然科學報告, Natural science report of the Ochanomizu University},
 month = {Feb},
 note = {紀要論文},
 pages = {7--16},
 title = {WEB GEOMETRY of SOLUTIONS of  FIRST ORDER ODEs},
 volume = {68},
 year = {2018}
}