@article{GDZPPN002329514, title = {Tournaments, Flags, and Harmonic Maps.}, journal = {Mathematische Annalen}, volume = {277}, year = {1987}, pages = {249-266}, zbl = {0597.58005}, url = {http://dml.mathdoc.fr/item/GDZPPN002329514} }
Salamon, S.M.; Burstall, F.E. Tournaments, Flags, and Harmonic Maps.. Mathematische Annalen, Tome 277 (1987) pp. 249-266. http://gdmltest.u-ga.fr/item/GDZPPN002329514/