MR0763935
Saito, Tosiya and Tsukamoto, Ichiro
Tosiya SAITO and Ichiro TSUKAMOTO
Perturbation method for linear periodic systems. I
Funkcialaj Ekvacioj. Serio Internacia
27
1984
25--48
http://fe.math.kobe-u.ac.jp/FE/Free/vol27/fe27-1-2.pdf
http://fe.math.kobe-u.ac.jp/FE/FE_pdf_with_bookmark/FE21-30-en_KML/fe27-025-048/fe27-025-048.pdf
http://www.ams.org/mathscinet-getitem?mr=MR0763935
fe27-025-048
1984
Perturbation Method for Linear Periodic Systems I
SAITO, Tosiya; TSUKAMOTO, Ichiro
SAITO, Tosiya; TSUKAMOTO, Ichiro
1
Saito, T.
On a singular point of a second order linear differential equation containing a parameter
Funkcial. Ekvac.
5
1963
1-29
MR0159064
0159064
100
Cache/Sa/Saito,singular,Funkcial*,1963,1964
2
Sibuya, Y.
Perturbation at an irregular singular point
Japan-U.S. seminar on ordinary and functional equations, Lecture Notes in Math., Springer, 243
1971
148-168
MR0390337
Cache/Si/Sibuya,Perturbation,*,1971,1972