The problem of singular perturbations of linear ordinary differential equations at regular singular points. {II}

MR0245929 Russell, David L. and Sibuya, Yasutaka David L. RUSSELL and Yasutaka SIBUYA The problem of singular perturbations of linear ordinary differential equations at regular singular points. {II} Funkcialaj Ekvacioj. Serio Internacia 11 1969 175--184 http://fe.math.kobe-u.ac.jp/FE/Free/vol11/fe11-14.pdf http://fe.math.kobe-u.ac.jp/FE/FE_pdf_with_bookmark/FE11-20-en_KML/fe11-175-184/fe11-175-184.pdf http://www.ams.org/mathscinet-getitem?mr=MR0245929 fe11-175-184 1969 The Problem of Singular Perturbations of Linear Ordinary Differential Equations at Regular Singular Points, II RUSSELL, David L.; SIBUYA, Yasutaka RUSSELL, David L.; SIBUYA, Yasutaka 1 Russell, D. L.; Sibuya, Y. The problem of singular perturbations of linear ordinary differential equations at regular singular points, I Funk. Ekv. 9 1966 207-218 MR0214869 0214869 100 Cache/Ru/Russell,perturbations,Funk*,1966,1967

2 Sibuya, Y. Sur réduction analytique d'un système d'équations différentielles ordinaires linéaires contenant un paramètre J. Fac. Sci., Univ. of Tokyo 7 1958 527-540 MR0096016 91 Cache/Si/Sibuya,Sur,J*,1958,1959

3 Wasow, W. Asymptotic expansions for ordinary differential equations Interscience Publishers, New York 1965 MR0166448 Cache/Wa/Wasow,Asymptotic,Interscience,*,1965,1966