1. Martingales, the Malliavin calculus and hypoellipticity under general Hörmander conditions;Bismut;Z. Wahrsch. Verw. Gebiete,1981
2. Robustesse en théorie du filtrage et calcul des variations stochastique;Chaleyat-Maurel;C. R. Acad. Sci. Paris,1983
3. The design of robust approximations to the stochastic differential equations of non linear filtering;Clark,1978
4. Pathwise non linear filtering;Davis,1981
5. Robust filtering for correlated multidimensional observations;Elliott;Math. Z.,1981