@article{GDZPPN002204479,
title = {A regularity theorem for harmonic mappings.},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {374},
year = {1987},
pages = {1-11},
zbl = {0607.58010},
url = {http://dml.mathdoc.fr/item/GDZPPN002204479}
}
Tachikawa, Atsushi. A regularity theorem for harmonic mappings.. Journal für die reine und angewandte Mathematik, Tome 374 (1987) pp. 1-11. http://gdmltest.u-ga.fr/item/GDZPPN002204479/