@article{DAN_1969_188_1_a1,
     author = {A. D. Venttsel' and M. I. Freidlin},
     title = {The limiting behavior of the invariant measure under small perturbations of a dynamical system},
     journal = {Doklady Akademii Nauk},
     pages = {13--16},
     publisher = {mathdoc},
     volume = {188},
     number = {1},
     year = {1969},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1969_188_1_a1/}
}