@article{COCV_2006__12_2_216_0,
     author = {Soravia, Pierpaolo},
     title = {Degenerate {Eikonal} equations with discontinuous refraction index},
     journal = {ESAIM: Control, Optimisation and Calculus of Variations},
     pages = {216--230},
     publisher = {EDP-Sciences},
     volume = {12},
     number = {2},
     year = {2006},
     doi = {10.1051/cocv:2005033},
     mrnumber = {2209351},
     zbl = {1105.35026},
     language = {en},
     url = {http://www.numdam.org/articles/10.1051/cocv:2005033/}
}