@article{1178228027,
author = {Okayasu, Takashi},
title = {Pinching and nonexistence of stable harmonic maps},
journal = {Tohoku Math. J. (2)},
volume = {40},
number = {4},
year = {1988},
pages = { 213-220},
language = {en},
url = {http://dml.mathdoc.fr/item/1178228027}
}
Okayasu, Takashi. Pinching and nonexistence of stable harmonic maps. Tohoku Math. J. (2), Tome 40 (1988) no. 4, pp. 213-220. http://gdmltest.u-ga.fr/item/1178228027/