@article{TMF_1997_110_1_a6,
     author = {E. V. Ferapontov},
     title = {Laplace transformations of hydrodynamic-type systems in {Riemann} invariants},
     journal = {Teoreti\v{c}eska\^a i matemati\v{c}eska\^a fizika},
     pages = {86--97},
     year = {1997},
     volume = {110},
     number = {1},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/TMF_1997_110_1_a6/}
}