@article{JRAM_1981__324_152349,
     author = {J\"urgen Jost},
     title = {Univalency of harmonic mappings between surfaces.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {141--153},
     publisher = {mathdoc},
     volume = {324},
     year = {1981},
     zbl = {0453.53036},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1981__324_152349/}
}