@article{GDZPPN002204762,
title = {On the analyticity of minimal surfaces at movable boundaries of prescribed length.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {374},
year = {1987},
pages = {100-114},
zbl = {0617.53010},
url = {http://dml.mathdoc.fr/item/GDZPPN002204762}
}
Lewy, H.; Hildebrandt, S.; Dierkes, U. On the analyticity of minimal surfaces at movable boundaries of prescribed length.. Journal für die reine und angewandte Mathematik, Tome 374 (1987) pp. 100-114. http://gdmltest.u-ga.fr/item/GDZPPN002204762/