@article{DE_1990_26_11_a13,
     author = {I. P. Smirnov},
     title = {Necessary conditions for optimality in a problem of the entry of a controllable random process into a given domain},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1943--1949},
     publisher = {mathdoc},
     volume = {26},
     number = {11},
     year = {1990},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1990_26_11_a13/}
}