@article{MAN_1988__280_3_164386,
     author = {Paul Baird and John C. Wood},
     title = {Bernstein {Theorems} for {Harmonic} {Morphisms} from {R3} and {S3.}},
     journal = {Mathematische Annalen},
     pages = {579--604},
     publisher = {mathdoc},
     volume = {280},
     number = {3},
     year = {1988},
     zbl = {0621.58011},
     url = {http://geodesic.mathdoc.fr/item/MAN_1988__280_3_164386/}
}