@article{MZ_1991__206_1_174244,
     author = {Bennett Palmer},
     title = {Index and stability of harmonic {Gauss} maps.},
     journal = {Mathematische Zeitschrift},
     pages = {563--566},
     publisher = {mathdoc},
     volume = {206},
     number = {1},
     year = {1991},
     zbl = {0727.58011},
     url = {http://geodesic.mathdoc.fr/item/MZ_1991__206_1_174244/}
}