@article {1999,
	title = {Vanishing viscosity solutions of hyperbolic systems on manifolds},
	number = {SISSA;24/99/M},
	year = {1999},
	publisher = {SISSA Library},
	url = {http://hdl.handle.net/1963/1238},
	author = {Stefano Bianchini and Alberto Bressan}
}
