@article{DE_2003_39_5_a13,
     author = {A. N. Zarubin},
     title = {An {Initial-Boundary} {Value} {Problem} for a {Difference-Differential} {Tricomi} {Equation} in an {Unbounded} {Domain}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {715--717},
     publisher = {mathdoc},
     volume = {39},
     number = {5},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2003_39_5_a13/}
}