@article{MM2_1976__18_154392,
     author = {Michael Wiegner},
     title = {A-Priori {Schranken} f\"ur {L\"osungen} gewisser elliptischer {Probleme.}},
     journal = {Manuscripta mathematica},
     pages = {279--298},
     publisher = {mathdoc},
     volume = {18},
     year = {1976},
     zbl = {0323.35032},
     url = {http://geodesic.mathdoc.fr/item/MM2_1976__18_154392/}
}