@article{GDZPPN002338904, title = {Quaternionic geometry of a nilpotent variety.}, journal = {Mathematische Annalen}, volume = {295}, year = {1993}, pages = {747-764}, zbl = {0807.53040}, url = {http://dml.mathdoc.fr/item/GDZPPN002338904} }
Swann, Andrew; Kobak, Piotr Z. Quaternionic geometry of a nilpotent variety.. Mathematische Annalen, Tome 295 (1993) pp. 747-764. http://gdmltest.u-ga.fr/item/GDZPPN002338904/