@article{article1238a131,
title   = {Lower order perturbation and global analytic vectors for a class of globally analytic hypoelliptic operators},
author = {Rodrigues, Nicholas Braun and Chinni, Gregorio and Cordaro, Paulo Domingos and Jahnke, Max Reinhold},
year = {2016},
doi = {10.1090/proc/13178},
journal   = {Proceedings of the American Mathematical Society}
}