3 citations to https://www.mathnet.ru/rus/tvp720

1. P. Frost, T. Kailath, “An innovations approach to least-squares estimation–Part III: Nonlinear estimation in white Gaussian noise”, IEEE Trans. Automat. Contr., 16:3 (1971), 217  
2. W. Wonham, “Conditional markov processes and their application to problems of optimal control”, IEEE Trans. Automat. Contr., 13:1 (1968), 137  
3. H. Kushner, “Approximations to optimal nonlinear filters”, IEEE Trans. Automat. Contr., 12:5 (1967), 546