The Riemann problem for a class of resonant hyperbolic systems of balance laws Paola Goatin; Philippe G. Le Floch — 2004 Annales de l'I.H.P. Analyse non linéaire
Well-posedness theory for geometry-compatible hyperbolic conservation laws on manifolds Matania Ben-Artzi; Philippe G. Le Floch — 2007 Annales de l'I.H.P. Analyse non linéaire