@article{MZ_1976__147_172336,
     author = {S. Hildebrandt and H. Kaul and K.-O. Widman},
     title = {Dirichlet's {Boundary} {Value} {Problem} for {Harmonic} {Mappings} of {Riemannian} {Manifolds.}},
     journal = {Mathematische Zeitschrift},
     pages = {225--236},
     publisher = {mathdoc},
     volume = {147},
     year = {1976},
     zbl = {0313.31015},
     url = {http://geodesic.mathdoc.fr/item/MZ_1976__147_172336/}
}