General elephants of $ℚ$-Fano 3-folds
Compositio Mathematica, Volume 91 (1994) no. 1, pp. 91-116.
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Alexeev, Valery. General elephants of $\mathbb {Q}$-Fano 3-folds. Compositio Mathematica, Volume 91 (1994) no. 1, pp. 91-116. http://archive.numdam.org/item/CM_1994__91_1_91_0/

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