@article{DE_1987_23_1_a10,
     author = {A. G. Kuz'min},
     title = {Second-order equations with an elliptic operator with respect to the space variables},
     journal = {Differencialʹnye uravneni\^a},
     pages = {102--113},
     publisher = {mathdoc},
     volume = {23},
     number = {1},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1987_23_1_a10/}
}