Continuous Glimm Functionals and Uniqueness of Solutions of the Riemann Problem M. Schatzman Indiana University Mathematics Journal 1985 text pdf 10.1512/iumj.1985.34.34030 10.1512/iumj.1985.34.34030 en Indiana Univ. Math. J. 34 (1985) 533 - 589 state-of-the-art mathematics http://iumj.org/access/