@article{IVM_2021_4_a4,
     author = {A. N. Zarubin},
     title = {The {Tricomi} problem for the {Lavrentiev{\textendash}Bitsadze} differential-difference equation},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {69--79},
     year = {2021},
     number = {4},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2021_4_a4/}
}