Impulse boundary-value problem for the Lyapunov equation with values in the Hilbert space. Neliniini Kolyvannya, [S. l.], v. 25, n. 4, p. 361–369, 2022. Disponível em: https://twinhead.imath.kiev.ua/index.php/nosc/article/view/1079. Acesso em: 21 jan. 2026.