BOICHUK, O.; PANASENKO, Ye.; POKUTNYI, O. Boundary-value problems for the Lyapunov equation. II. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 76, n. 5, p. 680–694, 2024. DOI: 10.3842/umzh.v76i5.7786. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/7786. Acesso em: 5 dec. 2025.