@article{MM2_1992__74_2_155684,
     author = {Friedrich Sauvigny},
     title = {A new proof of the gardient estimate for graphs of prescribed mean curvature.},
     journal = {Manuscripta mathematica},
     pages = {83--86},
     publisher = {mathdoc},
     volume = {74},
     number = {2},
     year = {1992},
     zbl = {0753.53007},
     url = {http://geodesic.mathdoc.fr/item/MM2_1992__74_2_155684/}
}