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@article{RSM_2002__60_2_116632, author = {Calvo, D.}, title = {Generalized {Gevrey} classes and multi-quasi-hyperbolic operators.}, journal = {Rendiconti del seminario matematico}, pages = {73--99}, publisher = {mathdoc}, volume = {60}, number = {2}, year = {2002}, zbl = {1177.35050}, language = {en}, url = {http://geodesic.mathdoc.fr/item/RSM_2002__60_2_116632/} }
Calvo, D. Generalized Gevrey classes and multi-quasi-hyperbolic operators.. Rendiconti del seminario matematico, Tome 60 (2002) no. 2, pp. 73-99. http://geodesic.mathdoc.fr/item/RSM_2002__60_2_116632/