@article{GDZPPN002338416, title = {Moduli of half conformally flat structures.}, journal = {Mathematische Annalen}, volume = {295}, year = {1993}, pages = {687-708}, zbl = {0788.58011}, url = {http://dml.mathdoc.fr/item/GDZPPN002338416} }
Itoh, Mitsuhiro. Moduli of half conformally flat structures.. Mathematische Annalen, Tome 295 (1993) pp. 687-708. http://gdmltest.u-ga.fr/item/GDZPPN002338416/