@article{MZ_1983__183_173340,
     author = {Erhard Heinz},
     title = {Minimalfl\"achen mit polygonalem {Rand.}},
     journal = {Mathematische Zeitschrift},
     pages = {547--564},
     year = {1983},
     volume = {183},
     language = {de},
     url = {http://geodesic.mathdoc.fr/item/MZ_1983__183_173340/}
}