@article{MAN_1989__285_1_164588,
     author = {Konrad Gr\"oger and Joachim Rehberg},
     title = {Resolvent estimates in {W} -1,p for second order elliptic differential operators in case of mixed boundary conditions.},
     journal = {Mathematische Annalen},
     pages = {105--114},
     publisher = {mathdoc},
     volume = {285},
     number = {1},
     year = {1989},
     zbl = {0659.35032},
     url = {http://geodesic.mathdoc.fr/item/MAN_1989__285_1_164588/}
}