@article{IVM_2017_11_a2,
     author = {A. N. Zarubin},
     title = {Tricomi problem for nonlinear equation of mixed type with functional retarding, advancing and concentrated deviation},
     journal = {Izvesti\^a vys\v{s}ih u\v{c}ebnyh zavedenij. Matematika},
     pages = {20--29},
     publisher = {mathdoc},
     number = {11},
     year = {2017},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/IVM_2017_11_a2/}
}