1. Ph. Bénilan and M. G. Crandall, “Regularizing Effects of Homogeneous Evolution Equations,” Mathematics Research Center Technical Summary Report No. 2076, University of Wisconsin-Madison.
2. K. S. Cheng, Asymptotic behavior of solutions of a conservation law without convexity condition, J. Differential Equations, in press.
3. The semigroup approach to first order quasilinear equations in several space variables;Crandall;Israel J. Math.,1972
4. M. G. Crandall and M. Pierre, “Regularizing Effects for ut + Aϑ(u) = 0 in L1,” Mathematics Research Center Technical Summary Report No. 2187, University of Wisconsin-Madison.
5. C. M. Dafermos, Asymptotic behavior in hyperbolic balance laws.