@article{DE_1989_25_9_a21,
     author = {O. M. Dzhokhadze},
     title = {Some variants of the {Frankl'} problem for the {Lavrent'ev--Bitsadze} equation in a half-plane},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1614--1618},
     publisher = {mathdoc},
     volume = {25},
     number = {9},
     year = {1989},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1989_25_9_a21/}
}