Nonclassical Riemann solvers and kinetic relations III: A nonconvex hyperbolic model for Van der Waals fluids. LeFloch, Philippe G., Mai Duc Thanh (2000) Electronic Journal of Differential Equations (EJDE) [electronic only]
Note on two compatibility criteria: Jacobi-Mayer bracket vs. differential Gröbner basis. Kruglikov, Boris (2006) Lobachevskii Journal of Mathematics