@article{DE_1992_28_8_a23,
     author = {M. E. Lerner},
     title = {On a problem for a model equation of mixed elliptic-parabolic-hyperbolic type in a domain with a doubly connected subdomain of hyperbolicity},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1456--1459},
     publisher = {mathdoc},
     volume = {28},
     number = {8},
     year = {1992},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1992_28_8_a23/}
}