@article{DE_2000_36_10_a10,
     author = {M. E. Lerner and O. A. Repin},
     title = {Boundary value problems for a mixed-type equation in domains with a doubly connected hyperbolicity subdomain},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1361--1364},
     publisher = {mathdoc},
     volume = {36},
     number = {10},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2000_36_10_a10/}
}