@article{GDZPPN002206684,
title = {The explicit construction of all harmonic two-spheres in G2 (Rn).},
journal = {Journal f\"ur die reine und angewandte Mathematik},
volume = {394},
year = {1989},
pages = {36-66},
zbl = {0665.58009},
url = {http://dml.mathdoc.fr/item/GDZPPN002206684}
}
Wood, John C.; Bahy-El-Dien, Adel. The explicit construction of all harmonic two-spheres in G2 (Rn).. Journal für die reine und angewandte Mathematik, Tome 394 (1989) pp. 36-66. http://gdmltest.u-ga.fr/item/GDZPPN002206684/