@article{AIHPC_1988__5_2_179_0,
     author = {Le Floch, Ph. and Raviart, P. A.},
     title = {An asymptotic expansion for the solution of the generalized {Riemann} problem. {Part} {I} : general theory},
     journal = {Annales de l'I.H.P. Analyse non lin\'eaire},
     pages = {179--207},
     publisher = {Gauthier-Villars},
     volume = {5},
     number = {2},
     year = {1988},
     mrnumber = {954470},
     zbl = {0679.35064},
     language = {en},
     url = {http://archive.numdam.org/item/AIHPC_1988__5_2_179_0/}
}