%0 Journal Article %A Fréderic Hélein %T Regularity of weakly harmonic maps from a surface into a manifold with symmetries. %J Manuscripta mathematica %D 1991 %P 203-218 %V 70 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/item/MM2_1991__70_1_155582/ %F MM2_1991__70_1_155582