@article{CMJ_2009__59_3_a6,
     author = {Schumacher, Katrin},
     title = {A chart preserving the normal vector and extensions of normal derivatives in weighted function spaces},
     journal = {Czechoslovak Mathematical Journal},
     pages = {637--648},
     publisher = {mathdoc},
     volume = {59},
     number = {3},
     year = {2009},
     mrnumber = {2545646},
     zbl = {1218.47019},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMJ_2009__59_3_a6/}
}