An asymptotic expansion for the solution of the generalized Riemann problem. Part I : general theory Ph. Le Floch; P. A. Raviart — 1988 Annales de l'I.H.P. Analyse non linéaire
An asymptotic expansion for the solution of the generalized Riemann problem. Part 2 : application to the equations of gas dynamics A. Bourgeade; Ph. Le Floch; P. A. Raviart — 1989 Annales de l'I.H.P. Analyse non linéaire