Analytic linear systems of differential equations in implicit form

MR0227496 Hanson, Richard J. Richard J. HANSON Analytic linear systems of differential equations in implicit form Funkcialaj Ekvacioj. Serio Internacia 10 1967 123--131 http://fe.math.kobe-u.ac.jp/FE/Free/vol10/fe10-8.pdf http://fe.math.kobe-u.ac.jp/FE/FE_pdf_with_bookmark/FE01-10-en_KML/fe10-123-131/fe10-123-131.pdf http://www.ams.org/mathscinet-getitem?mr=MR0227496 fe10-123-131 1967 Analytic Linear Systems of Differential Equations in Implicit Form HANSON, Richard J. HANSON, Richard J. 1 Gantmacher, F. R. Matrix Theory I, II Chelsea. New York 1959 MR0107649 ix+317 2 Hartman, P. Ordinary Differential Equations Iohn Wiley and Sons, Inc., New York 1964 MR0171038 100 Cache/Ha/Hartman,Ordinary,*,1964,1965 xiv+612 3 Wasow, W. Asymptotic Expansions for Ordinary Differential Equations John Wiley and Sons, Inc., New York 1965 MR0203188 Cache/Wa/Wasow,Asymptotic,*,1966,1967