@article{SEDP_1994-1995____A15_0,
     author = {Cheverry, C.},
     title = {Justification de l'optique g\'eom\'etrique non lin\'eaire pour un syst\`eme de lois de conservation},
     journal = {S\'eminaire \'Equations aux d\'eriv\'ees partielles (Polytechnique) dit aussi "S\'eminaire Goulaouic-Schwartz"},
     note = {talk:15},
     pages = {1--12},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     year = {1994-1995},
     language = {fr},
     url = {http://archive.numdam.org/item/SEDP_1994-1995____A15_0/}
}