@article{JRAM_1984__349_152621,
     author = {Albrecht K\"uster},
     title = {An optimal estimate of the free boundary of a minima surface.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {55--62},
     year = {1984},
     volume = {349},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1984__349_152621/}
}