@article{DE_1967_3_1_a0,
     author = {D. K. Gvazava},
     title = {Global solution of the {Tricomi} problem for a class of nonlinear differential equations of mixed type},
     journal = {Differencialʹnye uravneni\^a},
     pages = {3--10},
     publisher = {mathdoc},
     volume = {3},
     number = {1},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1967_3_1_a0/}
}