@article{BUMI_2006_8_9B_1_a1,
     author = {Calvo, Daniela},
     title = {Cauchy problem in multi-anisotropic {Gevrey} classes for weakly hyperbolic operators},
     journal = {Bollettino della Unione matematica italiana},
     pages = {21--50},
     publisher = {mathdoc},
     volume = {Ser. 8, 9B},
     number = {1},
     year = {2006},
     zbl = {1178.35236},
     mrnumber = {1435282},
     language = {it},
     url = {https://geodesic-test.mathdoc.fr/item/BUMI_2006_8_9B_1_a1/}
}