@article {2004,
	title = {A sharp decay estimate for positive nonlinear waves},
	journal = {SIAM J. Math. Anal. 36 (2004) 659-677},
	number = {SISSA;59/2003/M},
	year = {2004},
	publisher = {SIAM},
	abstract = {We consider a strictly hyperbolic, genuinely nonlinear system of conservation laws in one space dimension. A sharp decay estimate is proved for the positive waves in an entropy weak solution. The result is stated in terms of a partial ordering among positive measures, using symmetric rearrangements and a comparison with a solution of Burgers\\\' equation with impulsive sources.},
	doi = {10.1137/S0036141003427774},
	url = {http://hdl.handle.net/1963/2916},
	author = {Alberto Bressan and Tong Yang}
}
