@article{article89f70fc9,
title   = {On global hypoellipticity},
author = {Bergamasco, Adalberto Panobianco and Mendoza, G. A and Zani, Sérgio Luís},
year = {2012},
doi = {10.1080/03605302.2011.641054},
journal   = {Communications in Partial Differential Equations}
}