J. B. Bell, J. A. Trangenstein, and G. R. Shubin, Conservation Laws of Mixed Type Describing Three-Phase Flow in Porous Media, SIAM Journal on Applied Mathematics, vol.46, issue.6, pp.1000-1017, 1986.
DOI : 10.1137/0146059

R. M. Benzoni-gavage and . Colombo, An $n$ -populations model for traffic flow, European Journal of Applied Mathematics, vol.14, issue.5, pp.587-612, 2003.
DOI : 10.1017/S0956792503005266

S. Berres, R. Ruiz-baier, H. Schwandt, and E. M. Tory, An adaptive finite-volume method for a model of two-phase pedestrian flow, Netw. Heterog. Media, vol.6, pp.401-423, 2011.

J. Bick and G. F. Newell, A continuum model for two-directional traffic flow, Quarterly of Applied Mathematics, vol.18, issue.2, pp.191-204, 1960.
DOI : 10.1090/qam/99969

A. Bressan, Hyperbolic systems of conservation laws The one-dimensional Cauchy problem, of Oxford Lecture Series in Mathematics and its Applications, 2000.

S. Buchmüller and U. Weidmann, Parameters of pedestrians, pedestrian traffic and walking facilities, 2006.

F. Coquel and P. Lefloch, Convergence of Finite Difference Schemes for Conservation Laws in Several Space Dimensions: A General Theory, SIAM Journal on Numerical Analysis, vol.30, issue.3, pp.675-700, 1993.
DOI : 10.1137/0730033

R. J. Diperna, Measure-valued solutions to conservation laws, Archive for Rational Mechanics and Analysis, vol.2, issue.3, pp.223-270, 1985.
DOI : 10.1007/BF00752112

R. Eymard, T. Gallouët, and R. Herbin, Finite volume methods, in Handbook of numerical analysis, Handb. Numer. Anal, vol.VII, pp.713-1020, 2000.

A. D. Fitt, The numerical and analytical solution of ill-posed systems of conservation laws, Applied Mathematical Modelling, vol.13, issue.11, pp.618-631, 1989.
DOI : 10.1016/0307-904X(89)90171-6

U. S. Fjordholm, High-order accurate entropy stable numerical schemes for hyperbolic conservation laws, 2013.

U. S. Fjordholm, R. Käppeli, S. Mishra, and E. Tadmor, Construction of approximate entropy measure valued solutions for hyperbolic systems of conservation laws, ArXiv e-prints

H. Frid and I. Liu, Oscillation waves in Riemann problems inside elliptic regions for conservation laws of mixed type, ZAMP Zeitschrift f???r angewandte Mathematik und Physik, vol.81, issue.No. 5, pp.913-931, 1995.
DOI : 10.1007/BF00917877

D. Helbing, P. Molnár, I. J. Farkas, and K. Bolay, Self-Organizing Pedestrian Movement, Environment and Planning B: Planning and Design, vol.4, issue.3, pp.361-383, 2001.
DOI : 10.1068/b2697

H. Holden, L. Holden, and N. H. Risebro, Some qualitative properties of 2 × 2 systems of conservation laws of mixed type, in Nonlinear evolution equations that change type, Math. Appl, vol.27, pp.67-78, 1990.

E. Isaacson, D. Marchesin, B. Plohr, and B. Temple, The Riemann Problem Near a Hyperbolic Singularity: The Classification of Solutions of Quadratic Riemann Problems I, SIAM Journal on Applied Mathematics, vol.48, issue.5, pp.1009-1032, 1988.
DOI : 10.1137/0148059

B. L. Keyfitz, A Geometric Theory of Conservation Laws which Change Type: Plenary Lecture held at the Annual GAMM Conference at Braunschweig, Germany, April 4-9, 1994, ZAMM - Journal of Applied Mathematics and Mechanics / Zeitschrift f??r Angewandte Mathematik und Mechanik, vol.56, issue.8, pp.571-581, 1995.
DOI : 10.1002/zamm.19950750802

B. L. Keyfitz, Singular shocks: retrospective and prospective, Confluentes Math, pp.445-470, 2011.

P. Lax and B. Wendroff, Systems of conservation laws, Communications on Pure and Applied Mathematics, vol.47, issue.2, pp.217-237, 1960.
DOI : 10.1002/cpa.3160130205

T. P. Liu, The Riemann Problem for General 2 ?? 2 Conservation Laws, Transactions of the American Mathematical Society, vol.199, pp.89-112, 1974.
DOI : 10.2307/1996875

M. Moussa¨?dmoussa¨?d, E. G. Guillot, M. Moreau, J. Fehrenbach, O. Chabiron et al., Traffic Instabilities in Self-Organized Pedestrian Crowds, PLoS Computational Biology, vol.75, issue.3, p.1002442, 2012.
DOI : 10.1371/journal.pcbi.1002442.s006

H. B. Stewart and B. Wendroff, Two-phase flow: models and methods, J. Comput. Phys, vol.5684, pp.363-4090021, 1984.

L. Tartar, Compensated compactness and applications to partial differential equations, in Nonlinear analysis and mechanics: Heriot-Watt Symposium, Res. Notes in Math, vol.39, pp.136-212, 1979.

V. Vinod, Structural stability of Riemann solutions for a multiple kinematic conservation law model that changes type, pp.77204-3476, 1992.