SURGAILIS, D. On stochastic equations in filtering of Markov processes. Lithuanian Mathematical Journal, [S. l.], v. 10, n. 3, p. 565–581, 1970. DOI: 10.15388/LMJ.1970.20906. Disponível em: https://journals.vu.lt./LMJ/article/view/20906. Acesso em: 26 apr. 2025.