TY - JOUR AU - Frédéric Hélein TI - On weakly harmonic maps and Noether harmonic maps from a Riemann surface into a Riemannian manifold JO - Banach Center Publications PY - 1992 SP - 175 EP - 181 VL - 27 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/articles/10.4064/-27-1-175-181/ DO - 10.4064/-27-1-175-181 LA - en ID - 10_4064__27_1_175_181 ER -