@article{JRAM_1993__440_153532,
     author = {Josef Dorfmeister and Hongyou Wu},
     title = {Constant mean curvature surfaces and loop groups.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {43--76},
     publisher = {mathdoc},
     volume = {440},
     year = {1993},
     zbl = {0779.53004},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1993__440_153532/}
}