@article{DE_1975_11_1_a16,
     author = {M. M. Khachev},
     title = {The {Dirichlet} problem for the {Tricomi} equation in a rectangle},
     journal = {Differencialʹnye uravneni\^a},
     pages = {151--160},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1975_11_1_a16/}
}