@article{GDZPPN002226731,
title = {Rotationally Symmetric Harmonic Maps from a Ball into a Warped Product Manifold.},
journal = {Manuscripta mathematica},
volume = {53},
year = {1985},
pages = {235-254},
zbl = {0578.58008},
url = {http://dml.mathdoc.fr/item/GDZPPN002226731}
}
Tachikawa, Atsushi. Rotationally Symmetric Harmonic Maps from a Ball into a Warped Product Manifold.. Manuscripta mathematica, Tome 53 (1985) pp. 235-254. http://gdmltest.u-ga.fr/item/GDZPPN002226731/