TY - JOUR AU - Willi Jäger AU - Helmut Kaul TI - Rotationally symmetric harmonic maps from a ball into a sphere and the regularity problem for weak solutions of elliptic systems. JO - Journal für die reine und angewandte Mathematik PY - 1983 SP - 146 EP - 161 VL - 343 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/JRAM_1983__343_152552/ ID - JRAM_1983__343_152552 ER -