@article{DE_1977_13_2_a18,
     author = {I. V. Maiorov},
     title = {Some problems for a certain degenerate hyperbolic system},
     journal = {Differencialʹnye uravneni\^a},
     pages = {369--372},
     publisher = {mathdoc},
     volume = {13},
     number = {2},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1977_13_2_a18/}
}