@article{DE_1968_4_10_a9,
     author = {V. I. Korzyuk},
     title = {A conjugacy problem for equations of hyperbolic and parabolic types},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1854--1866},
     publisher = {mathdoc},
     volume = {4},
     number = {10},
     year = {1968},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1968_4_10_a9/}
}