@article{JRAM_1987__381_152969,
     author = {Robert Gulliver and J\"urgen Jost},
     title = {Harmonic maps which solve a free-boundary problem.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {61--89},
     year = {1987},
     volume = {381},
     zbl = {0619.35117},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1987__381_152969/}
}