@article{SEDP_1976-1977____A2_0,
     author = {Beals, R.},
     title = {\'Equations d'\'evolution du type hyperbolique non strict},
     journal = {S\'eminaire Goulaouic-Schwartz},
     note = {talk:2},
     pages = {1--8},
     year = {1976-1977},
     publisher = {Ecole Polytechnique, Centre de Math\'ematiques},
     mrnumber = {481323},
     zbl = {0362.47011},
     language = {fr},
     url = {https://www.numdam.org/item/SEDP_1976-1977____A2_0/}
}