MR0207513
null
T. NISHIMOTO and K. OKUBO
Works of Professor Mitio Nagumo
Funkcialaj Ekvacioj. Serio Internacia
9
1966
xviii--xxii
http://fe.math.kobe-u.ac.jp/FE/Free/vol09/fe09-6.pdf
http://fe.math.kobe-u.ac.jp/FE/no-infty-pdf.pdf
http://www.ams.org/mathscinet-getitem?mr=MR0207513
fe09-xviii-xxii
1966
Works of Professor Mitio Nagumo
Nishimoto, T. and Okubo, K
Nishimoto, T. and Okubo, K