@article{articleaaf6b80a,
title   = {Gevrey solvability near the characteristic set for a class of planar complex vector fileds of infinite type},
author = {Bergamasco, Adalberto Panobianco and Dattori da Silva, Paulo Leandro and Ebert, Marcelo Rempel},
year = {2009},
doi = {10.1016/j.jde.2008.10.028},
journal   = {Journal of Differential Equations}
}