@article{IM2_1985_25_3_a2,
     author = {A. Yu. Veretennikov},
     title = {Probabilistic problems in the theory of hypoellipticity},
     journal = {Izvestiya. Mathematics},
     pages = {455--473},
     year = {1985},
     volume = {25},
     number = {3},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_1985_25_3_a2/}
}