@article{AFST_2001_6_10_2_313_0,
     author = {Hajouj, Brahim and Madaune-Tort, Monique},
     title = {Perturbations singuli\`eres pour une \'equation hyperbolique d\'eg\'en\'er\'ee},
     journal = {Annales de la Facult\'e des sciences de Toulouse : Math\'ematiques},
     pages = {313--345},
     publisher = {Universit\'e Paul Sabatier. Facult\'e des sciences},
     address = {Toulouse},
     volume = {6e s{\'e}rie, 10},
     number = {2},
     year = {2001},
     mrnumber = {1896185},
     zbl = {1027.35010},
     language = {fr},
     url = {http://www.numdam.org/item/AFST_2001_6_10_2_313_0/}
}