@article{GDZPPN002439131,
title = {On the rank of harmonic maps.},
journal = {Mathematische Zeitschrift},
volume = {207},
year = {1991},
pages = {535-538},
zbl = {0717.31006},
url = {http://dml.mathdoc.fr/item/GDZPPN002439131}
}
Kazdan, Jerry L.; Jin, Zhiren. On the rank of harmonic maps.. Mathematische Zeitschrift, Tome 207 (1991) pp. 535-538. http://gdmltest.u-ga.fr/item/GDZPPN002439131/