@article{BUMI_2002_8_5B_1_a1,
     author = {Rykov, Yu. G.},
     title = {On the nonhamiltonian character of shocks in {2-D} pressureless gas},
     journal = {Bollettino della Unione matematica italiana},
     pages = {55--78},
     publisher = {mathdoc},
     volume = {Ser. 8, 5B},
     number = {1},
     year = {2002},
     zbl = {1096.35117},
     mrnumber = {1049623},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/BUMI_2002_8_5B_1_a1/}
}