@article{ASNSP_2004_5_3_3_589_0,
     author = {Hirosawa, Fumihiko and Reissig, Michael},
     title = {Non-Lipschitz coefficients for strictly hyperbolic equations},
     journal = {Annali della Scuola Normale Superiore di Pisa - Classe di Scienze},
     pages = {589--608},
     publisher = {Scuola Normale Superiore, Pisa},
     volume = {Ser. 5, 3},
     number = {3},
     year = {2004},
     mrnumber = {2099250},
     zbl = {1170.35471},
     language = {en},
     url = {http://archive.numdam.org/item/ASNSP_2004_5_3_3_589_0/}
}