(1)
Bihun, D. S.; Pokutnyi, O. O.; Panasenko, E. V. Autonomous Nonlinear Boundary-Value Problems for the Lyapunov Equation in Hilbert Space. Ukr. Mat. Zhurn. 2021, 73 (7), 867-878. https://doi.org/10.37863/umzh.v73i7.6691.