@article{EJDE_2000__2000__a216,
     author = {Zhang, Kewei},
     title = {Some constancy results for harmonic maps from non-contractable domains into spheres},
     journal = {Electronic Journal of Differential Equations},
     publisher = {mathdoc},
     volume = {2000},
     year = {2000},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/EJDE_2000__2000__a216/}
}