1. A. G. Mazko, “Splitting-off and localization of the spectrum of a matrix polynomial,” Dokl. Akad. Nauk Ukr., No. 10, 15–19 (1994).
2. A. G. Mazko, “Construction of analogs of the Lyapunov equation for a matrix polynomial,” Ukr. Mat. Zh., 47, No. 3, 337–343 (1995).
3. V. B. Khazanov, “On some spectral characteristics of λ-matrices,” Zap. LOMI, 139, 111–124 (1984).
4. V. N. Kublanovskaya and V. B. Khazanov, “Exhaustion in spectral problems for pencils of matrices,” Vychisl. Prots. Sist., Issue 5, 138–147 (1987).
5. T. R. Crossley and B. Porter, “Simple proof of the Simon-Mitter controllability theorem,” Electron. Lett., 9, No. 3, 51–52 (1973).