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@article{MZ_1991__207_2_174281, author = {William E. Lang}, title = {Extremal rational elliptic surfaces in characteristic p. {I.} {Beauville} surfaces.}, journal = {Mathematische Zeitschrift}, pages = {429--438}, publisher = {mathdoc}, volume = {207}, number = {2}, year = {1991}, zbl = {0757.14012}, url = {http://geodesic.mathdoc.fr/item/MZ_1991__207_2_174281/} }
William E. Lang. Extremal rational elliptic surfaces in characteristic p. I. Beauville surfaces.. Mathematische Zeitschrift, Tome 207 (1991) no. 2, pp. 429-438. http://geodesic.mathdoc.fr/item/MZ_1991__207_2_174281/