@article{GDZPPN002207036,
title = {An optimal estimate for the singular set of a harmonic map in the free boundary.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {394},
year = {1989},
pages = {157-187},
zbl = {0679.35015},
url = {http://dml.mathdoc.fr/item/GDZPPN002207036}
}
Steffen, Klaus; Duzaar, Frank. An optimal estimate for the singular set of a harmonic map in the free boundary.. Journal für die reine und angewandte Mathematik, Tome 394 (1989) pp. 157-187. http://gdmltest.u-ga.fr/item/GDZPPN002207036/