TY - JOUR AU - Palagachev, Dian K. AU - Popivanov, Peter R. TI - Sub-elliptic boundary value problems for quasilinear operators JO - Electronic Journal of Differential Equations PY - 1997 VL - 1997 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_1997__1997__a24/ LA - en ID - EJDE_1997__1997__a24 ER -