@article{GDZPPN002439077,
title = {Extremal rational elliptic surfaces in characteristic p. I. Beauville surfaces.},
journal = {Mathematische Zeitschrift},
volume = {207},
year = {1991},
pages = {429-438},
zbl = {0757.14012},
url = {http://dml.mathdoc.fr/item/GDZPPN002439077}
}
Lang, William E. Extremal rational elliptic surfaces in characteristic p. I. Beauville surfaces.. Mathematische Zeitschrift, Tome 207 (1991) pp. 429-438. http://gdmltest.u-ga.fr/item/GDZPPN002439077/