@article{CM_1989__69_2_175_0,
     author = {Coron, J. M. and Helein, F.},
     title = {Harmonic diffeomorphisms, minimizing harmonic maps and rotational symmetry},
     journal = {Compositio Mathematica},
     pages = {175--228},
     publisher = {Kluwer Academic Publishers},
     volume = {69},
     number = {2},
     year = {1989},
     mrnumber = {984634},
     zbl = {0686.58012},
     language = {en},
     url = {http://www.numdam.org/item/CM_1989__69_2_175_0/}
}