Voina OA, Sidorov MV. Equations of optimal nonlinear filtration and interpolation for partially observed Markov processes. Ukr. Mat. Zhurn. [Internet]. 1994 Aug. 25 [cited 2025 Dec. 5];46(8):971–976. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/5649