%0 Journal Article %A Palagachev, Dian K. %A Popivanov, Peter R. %T Sub-elliptic boundary value problems for quasilinear operators %J Electronic Journal of Differential Equations %D 1997 %V 1997 %I mathdoc %U http://geodesic.mathdoc.fr/item/EJDE_1997__1997__a0/ %G en %F EJDE_1997__1997__a0