@article{MZ_1973__131_171886,
     author = {Neil S. Trudinger},
     title = {Gradient {Estimates} and {Mean} {Curvatures.}},
     journal = {Mathematische Zeitschrift},
     pages = {165--176},
     publisher = {mathdoc},
     volume = {131},
     year = {1973},
     zbl = {0253.53003},
     url = {http://geodesic.mathdoc.fr/item/MZ_1973__131_171886/}
}