@article{GDZPPN002232707,
title = {Harmonic maps from a Riemannian manifold with a pole into an Hadamard manifold with negative sectional curvatures.},
journal = {Manuscripta mathematica},
volume = {76},
year = {1992},
pages = {69-82},
zbl = {0753.58007},
url = {http://dml.mathdoc.fr/item/GDZPPN002232707}
}
Tachikawa, Atsushi. Harmonic maps from a Riemannian manifold with a pole into an Hadamard manifold with negative sectional curvatures.. Manuscripta mathematica, Tome 76 (1992) pp. 69-82. http://gdmltest.u-ga.fr/item/GDZPPN002232707/