BoichukO., PanasenkoYe., and PokutnyiO. “Boundary-Value Problems for the Lyapunov Equation. І”. Ukrains’kyi Matematychnyi Zhurnal 76, no. 3 (March 25, 2024): 353 - 372. Accessed December 22, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/7785.