@article{01125927,
title = {Sub-elliptic boundary value problems for quasilinear operators.},
journal = {Electronic Journal of Differential Equations (EJDE) [electronic only]},
volume = {1997},
year = {1997},
zbl = {0886.35061},
language = {en},
url = {http://dml.mathdoc.fr/item/01125927}
}
Palagachev, Dian K.; Popivanov, Peter R. Sub-elliptic boundary value problems for quasilinear operators.. Electronic Journal of Differential Equations (EJDE) [electronic only], Tome 1997 (1997) . http://gdmltest.u-ga.fr/item/01125927/