@article{DE_2003_39_10_a11,
     author = {V. P. Orlov},
     title = {Weakly {Degenerate} {Hyperbolic} {Equations}},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1409--1419},
     publisher = {mathdoc},
     volume = {39},
     number = {10},
     year = {2003},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_2003_39_10_a11/}
}