@article{DE_1975_11_1_a19,
     author = {A. B. Bazarbekov},
     title = {A certain problem of {A.\,V.~Bicadze} for an equation of mixed type with a closed curve of degeneracy},
     journal = {Differencialʹnye uravneni\^a},
     pages = {176--179},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_1_a19/}
}