DOROGOVTSEV, A. Ya. Stationary and periodic solutions of the operator Riccati equation under a random perturbation. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 45, n. 5, p. 609–615, 1993. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5849. Acesso em: 5 dec. 2025.