@article{JRAM_1987__377_152929,
     author = {Maria Athanassenas},
     title = {A variational problem for constant mean curvature surfaces with free boundary.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {97--107},
     publisher = {mathdoc},
     volume = {377},
     year = {1987},
     zbl = {0604.53003},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1987__377_152929/}
}