@article{DE_1996_32_11_a15,
     author = {\u{I}ordan Tabov},
     title = {Riemann invariants for a class of partial differential systems},
     journal = {Differencialʹnye uravneni\^a},
     pages = {1554--1557},
     publisher = {mathdoc},
     volume = {32},
     number = {11},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DE_1996_32_11_a15/}
}