1. A. E. Bryson (Jr.), Yu-Chi Ho, Applied optimal control: optimization, estimation and control, 1st ed., Taylor Francis Group, New York, London (1975).
2. A. A. Boichuk, S. A. Krivosheya, A critical periodic boundary-value problem for a matrix Riccati equation, Different. Equat., 37, № 4, 464–471 (2001).
3. А. А. Бойчук, В. Ф. Журавлев, А. М. Самойленко, Обобщенно-обратные операторы и нетеровы краевые задачи, Институт математики НАН Украины, Киев (1995).
4. I. A. Bondar, Linear boundary-value problems for systems of integrodifferential equations with degenerate kernel. Resonance case for a weakly perturbed boundary-value problem, J. Math. Sci., 274, № 6, 822–832 (2023); DOI: https://doi.org/10.1007/s10958-023-06645-1.
5. Ju. L. Daleckii, M. G. Krein, Stability of solutions of differential equations in Banach space, Amer. Math. Soc. (2002).