@article{GDZPPN002067161, title = {Calibrated geometries in Grassmann manifolds.}, journal = {Commentarii mathematici Helvetici}, volume = {64}, year = {1989}, pages = {256-268}, zbl = {0681.53039}, url = {http://dml.mathdoc.fr/item/GDZPPN002067161} }
Ziller, W.; Gluck, H.; Morgan, F. Calibrated geometries in Grassmann manifolds.. Commentarii mathematici Helvetici, Tome 64 (1989) pp. 256-268. http://gdmltest.u-ga.fr/item/GDZPPN002067161/