TY - JOUR AU - A. Yu. Veretennikov TI - Probabilistic problems in the theory of hypoellipticity JO - Izvestiya. Mathematics PY - 1985 SP - 455 EP - 473 VL - 25 IS - 3 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/IM2_1985_25_3_a2/ LA - en ID - IM2_1985_25_3_a2 ER -