BoichukO., PanasenkoYe., and PokutnyiO. “Boundary-Value Problems for the Lyapunov Equation. II”. Ukrains’kyi Matematychnyi Zhurnal 76, no. 5 (June 2, 2024): 680 - 694. Accessed November 21, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/7786.