@article{GDZPPN002228572, title = {Regularity and uniqueness of harmonic maps into and ellipsoid.}, journal = {Manuscripta mathematica}, volume = {61}, year = {1988}, pages = {235-258}, zbl = {0646.58020}, url = {http://dml.mathdoc.fr/item/GDZPPN002228572} }
Helein, Frédéric. Regularity and uniqueness of harmonic maps into and ellipsoid.. Manuscripta mathematica, Tome 61 (1988) pp. 235-258. http://gdmltest.u-ga.fr/item/GDZPPN002228572/