@article{GDZPPN002324164, title = {On Enriques Surfaces in Characteristic p. I.}, journal = {Mathematische Annalen}, volume = {264}, year = {1983}, pages = {45-66}, zbl = {0575.14032}, url = {http://dml.mathdoc.fr/item/GDZPPN002324164} }
Lang, William E. On Enriques Surfaces in Characteristic p. I.. Mathematische Annalen, Tome 264 (1983) pp. 45-66. http://gdmltest.u-ga.fr/item/GDZPPN002324164/