@article{articlea339c23e,
title   = {Cк solvability near the characteristic set for a class of elliptic vector fields with degeneracies},
author = {Dattori da Silva, Paulo Leandro and Marques, Jorge and Silva, Evandro Raimundo da},
year = {2015},
doi = {10.1007/s00013-015-0735-8},
journal   = {Archiv der Mathematik}
}