@article{IM_1984__75_143110,
     author = {M. Struwe},
     title = {On a free boundary problem for minimal surfaces.},
     journal = {Inventiones mathematicae},
     pages = {547--560},
     publisher = {mathdoc},
     volume = {75},
     year = {1984},
     zbl = {0537.35037},
     url = {http://geodesic.mathdoc.fr/item/IM_1984__75_143110/}
}