@article{article3c13cc4b,
title   = {On global analytic and Gevrey hypoellipticity on the torus and the Métivier inequality},
author = {Chinni, G. and Cordaro, Paulo Domingos},
year = {2017},
doi = {10.1080/03605302.2016.1258577},
journal   = {Communications in Partial Differential Equations}
}