@article{DE_1967_3_2_a12,
     author = {I. I. Markus},
     title = {Asymptotic representation of the solution of a mixed problem for a differential equation of hyperbolic type with a small parameter},
     journal = {Differencialʹnye uravneni\^a},
     pages = {294--314},
     publisher = {mathdoc},
     volume = {3},
     number = {2},
     year = {1967},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1967_3_2_a12/}
}