1. A. Ya. Bulgakov, ?Effectively calculable parameter of stability quality of systems of linear differential equations with constant coefficients,? Sib. Mat. Zh.,21, No. 3, 32?41 (1980).
2. S. K. Godunov, ?The problem of the dichotomy of the spectrum of a matrix,? Sib. Mat. Zh.,27, No. 5, 24?37 (1986).
3. S. K. Godunov and V. M. Gordienko, ?The Green matrix of a boundary value problem for ordinary differential equations,? Usp. Mat. Nauk,39, No. 1, 39?76 (1984).
4. F. R. Gantmakher (Gantmacher), The Theory of Matrices, Vols. I and II, Chelsea, New York (1959).
5. S. K. Godunov, The Solution of Systems of Linear Equations [in Russian], Nauka, Novosibisk (1980).