%0 Journal Article %A Frédéric Hélein %T On weakly harmonic maps and Noether harmonic maps from a Riemann surface into a Riemannian manifold %J Banach Center Publications %D 1992 %P 175-181 %V 27 %N 1 %I mathdoc %U http://geodesic.mathdoc.fr/articles/10.4064/-27-1-175-181/ %R 10.4064/-27-1-175-181 %G en %F 10_4064__27_1_175_181