@article{MM2_1973__9_154172,
     author = {Wolf von Wahl},
     title = {Innere {Absch\"atzungen} f\"ur nichtlineare elliptische {Gleichungen} und {Systeme} in der {Ebene.}},
     journal = {Manuscripta mathematica},
     pages = {375--382},
     publisher = {mathdoc},
     volume = {9},
     year = {1973},
     zbl = {0261.35037},
     url = {http://geodesic.mathdoc.fr/item/MM2_1973__9_154172/}
}