@article{IVM_1971_8_a0,
     author = {Yu. S. Baburin},
     title = {The {Tricomi} problem for the {Lavrent'ev{\textendash}Bitsadze} equation in a multiply connected {domain,~I}},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {3--10},
     year = {1971},
     number = {8},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_1971_8_a0/}
}