@article{GDZPPN002223279,
title = {Optimal Boundary Regularity for Minimal Surfaces with a Free Boundary.},
journal = {Manuscripta mathematica},
volume = {31},
year = {1980},
pages = {357-364},
zbl = {0465.49029},
url = {http://dml.mathdoc.fr/item/GDZPPN002223279}
}
Hildebrandt, S.; Nitsche, J.C.C. Optimal Boundary Regularity for Minimal Surfaces with a Free Boundary.. Manuscripta mathematica, Tome 31 (1980) pp. 357-364. http://gdmltest.u-ga.fr/item/GDZPPN002223279/