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Translated from Itogi Nauki i Tekhniki, Seriya Sovremenaya Matematika i Ee Prilozheniya. Tematicheskie Obzory. Vol. 56. Algebraic Geometry-9, 1998.
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Kollár, J. Real algebraic threefolds, III. Conic bundles. J Math Sci 94, 996–1020 (1999). https://doi.org/10.1007/BF02367244
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DOI: https://doi.org/10.1007/BF02367244