@article{DE_1979_15_1_a16,
     author = {Yu. U. Tashmirzaev},
     title = {A boundary value problem with general glueing conditions for an equation of mixed type with two lines of degeneracy},
     journal = {Differencialʹnye uravneni\^a},
     pages = {132--141},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1979_15_1_a16/}
}