@article{TMF_1996_108_1_a8,
     author = {E. V. Ferapontov and R. A. Sharipov},
     title = {On first-order conservation laws for systems of hydronamic type equations},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {109--128},
     publisher = {mathdoc},
     volume = {108},
     number = {1},
     year = {1996},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1996_108_1_a8/}
}