@article{10_4153_CJM_1978_054_4,
     author = {Har'el, Zvi},
     title = {Harmonic {Mappings} of {Negatively} {Curved} {Manifolds}},
     journal = {Canadian journal of mathematics},
     pages = {631--637},
     year = {1978},
     volume = {30},
     number = {3},
     doi = {10.4153/CJM-1978-054-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1978-054-4/}
}