@article{GDZPPN00231598X, title = {On the Periods of Enriques Surfaces. II.}, journal = {Mathematische Annalen}, volume = {237}, year = {1978}, pages = {217-246}, zbl = {0412.14015}, url = {http://dml.mathdoc.fr/item/GDZPPN00231598X} }
Horikawa, Eiji. On the Periods of Enriques Surfaces. II.. Mathematische Annalen, Tome 237 (1978) pp. 217-246. http://gdmltest.u-ga.fr/item/GDZPPN00231598X/