@article{DE_1998_34_10_a19,
     author = {M. E. Lerner},
     title = {On the formulation of boundary value problems for equations of mixed parabolic-hyperbolic type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1430--1432},
     year = {1998},
     volume = {34},
     number = {10},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1998_34_10_a19/}
}