Bihun, D.S., Pokutnyi, O.O. and Panasenko, E.V. (2021) “Autonomous nonlinear boundary-value problems for the Lyapunov equation in Hilbert space”, Ukrains’kyi Matematychnyi Zhurnal, 73(7), pp. 867–878. doi:10.37863/umzh.v73i7.6691.