TY - JOUR AU - Bensoussan, Alain TI - Statistical problems in Hilbert spaces. Application to filtering theory JO - Kybernetika PY - 1970 SP - 270 EP - 279 VL - 6 IS - 4 UR - http://geodesic.mathdoc.fr/item/KYB_1970_6_4_a1/ LA - en ID - KYB_1970_6_4_a1 ER -