VOINA, O. A.; SIDOROV, M. V. Equations of optimal nonlinear filtration and interpolation for partially observed Markov processes. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 46, n. 8, p. 971–976, 1994. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/5649. Acesso em: 5 dec. 2025.