Hyperbolic Systems of Balance Laws with Inhomogeneity and Dissipation C. DafermosL. Hsiao Indiana University Mathematics Journal 1982 text pdf 10.1512/iumj.1982.31.31039 10.1512/iumj.1982.31.31039 en Indiana Univ. Math. J. 31 (1982) 471 - 491 state-of-the-art mathematics http://iumj.org/access/