@article{DE_1986_22_1_a8,
     author = {A. G. Kuz'min},
     title = {Boundary value problems for equations of mixed type containing a mixed derivative},
     journal = {Differencialʹnye uravneni\^a},
     pages = {66--74},
     publisher = {mathdoc},
     volume = {22},
     number = {1},
     year = {1986},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1986_22_1_a8/}
}