@article{GDZPPN002331551, title = {On Enriques Surfaces in Characteristic p. II.}, journal = {Mathematische Annalen}, volume = {280}, year = {1988}, pages = {671-686}, zbl = {0708.14026}, url = {http://dml.mathdoc.fr/item/GDZPPN002331551} }
Lang, William E. On Enriques Surfaces in Characteristic p. II.. Mathematische Annalen, Tome 280 (1988) pp. 671-686. http://gdmltest.u-ga.fr/item/GDZPPN002331551/