MR0252794 Kato, Junji Junji KATO Funkcialaj Ekvacioj. Serio Internacia 12 1969 89--98 http://fe.math.kobe-u.ac.jp/FE/Free/vol12/fe12-5.pdf http://fe.math.kobe-u.ac.jp/FE/FE_pdf_with_bookmark/FE11-20-en_KML/fe12-089-098/fe12-089-098.pdf http://www.ams.org/mathscinet-getitem?mr=MR0252794 fe12-089-098 1969 KATO, Junji KATO, Junji 1 Banks, H. T., Representations for solutions of linear functional differential equations, Technical Report 68-2, Center for Dynamical Systems, Brown University, March, 1968 MR0235237 2 Halanay, A. Differential Equations : Stability, Oscillations, Time Lags Academic Press, New York 1966 MR0216103 83 Cache/Ha/Halanay,Oscillations,,*,1966,1967 xii+528 3 Krasovskĭ, N. N. Stability of motion Stanford University Press, Stanford 1963 MR0147744 Cache/Kr/Krasovsk\check,stability,Stanford*,1963,1964 4 McShane, E. J. Integration Princeton University Press, Princeton 1944 MR0010606 Cache/Mc/McShane,Integration,Princeton*,1944,1945 5 Riesz, F.; Sz.-Nagy, B. Functional Analysis Ungar, New York 1955 MR0071727 Cache/Na/Nagy,Functional,Ungar,*,1955,1956 6 Zygmund, A. Trigonometric Series I Cambridge 1959 MR0107776 Cache/Zy/Zygmund,Trigonometric,Cambridge*,1959,1960