1. Yu. E. Boyarintsev, Regular and Singular Systems of Linear Ordinary Differential Equations (Nauka, Novosibirsk, 1980) [in Russian].
2. E. P. Serov and B. P. Korol’kov, Steam Generator Dynamics (Energoizdat, Moscow, 1981) [in Russian].
3. I. Vlakh and K. Singkhal, Machine Methods for Analysis and Design of Electronic Circuits (Radio Svyaz’, Moscow, 1988) [in Russian].
4. A. N. Konovalov, Filtration Problems for Multiphase Incompressible Fluid (Nauka, Novosibirsk, 1988) [in Russian].
5. R. Byers and N. K. Nichols, “On the stability radius of a generalized state-space system,” Linear Algebra Appl. 188–189, 113–134 (1993).