@article{SEDP_1998-1999____A5_0,
     author = {Joly, Jean-Luc and M\'etivier, Guy and Rauch, Jeffrey},
     title = {Nonlinear {Hyperbolic} {Smoothing} at a {Focal} {Point}},
     journal = {S\'eminaire Goulaouic-Schwartz},
     note = {talk:5},
     pages = {1--11},
     year = {1998-1999},
     publisher = {Centre de math\'ematiques Laurent Schwartz, \'Ecole polytechnique},
     zbl = {1059.35516},
     mrnumber = {1721323},
     language = {en},
     url = {https://www.numdam.org/item/SEDP_1998-1999____A5_0/}
}