The cohomological Brauer group of a~real algebraic variety
Izvestiya. Mathematics , Tome 60 (1996) no. 5, pp. 933-962.

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Methods are developed for calculating the cohomological Brauer group of a real algebraic variety, and they are used to determine completely the Brauer group of an Enriques surface.
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V. A. Krasnov. The cohomological Brauer group of a~real algebraic variety. Izvestiya. Mathematics , Tome 60 (1996) no. 5, pp. 933-962. http://geodesic.mathdoc.fr/item/IM2_1996_60_5_a4/

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