@article{MZ_1972__128_171804,
     author = {Stefan Hildebrandt},
     title = {Maximum {Principles} for {Minimal} {Surfaces} and for {Surfaces} of {Continuous} {Mean} {Curvature.}},
     journal = {Mathematische Zeitschrift},
     pages = {253--270},
     publisher = {mathdoc},
     volume = {128},
     year = {1972},
     zbl = {0253.53005},
     url = {http://geodesic.mathdoc.fr/item/MZ_1972__128_171804/}
}