@article{IVM_1983_12_a15,
     author = {E. V. Romashevskaya},
     title = {Singular cases of the {Darboux} problem for a~system of equations of the type of the {Tricomi} equations},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {73--75},
     year = {1983},
     number = {12},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1983_12_a15/}
}