@article{DAN_1990_311_2_a6,
     author = {M. M. Khrustalev and S. V. Savastyuk},
     title = {Conditions for the optimality of stochastic systems of diffusion},
     journal = {Doklady Akademii Nauk},
     pages = {291--295},
     publisher = {mathdoc},
     volume = {311},
     number = {2},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1990_311_2_a6/}
}