@article{DE_1979_15_1_a25,
     author = {S. M. Ponomarev},
     title = {Uniqueness of the solution of the {Tricomi} problem for an equation of mixed type in the plane},
     journal = {Differencialʹnye uravneni\^a},
     pages = {183--184},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1979_15_1_a25/}
}