Geodesic
On the classification of Mori contractions: the case of an elliptic curve
Izvestiya. Mathematics , Tome 65 (2001) no. 1, pp. 75-84

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We study three-dimensional Mori contractions $f\colon X\to Z$. It is proved that in a “good” model $(\overline{X},\overline{S})$ there are no elliptic components of $\operatorname{Diff}_{\overline{S}}$ with coefficients $\geqslant 6/7$. 
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     author = {Yu. G. Prokhorov},
     title = {On the classification of {Mori} contractions: the case of an elliptic curve},
     journal = {Izvestiya. Mathematics },
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     language = {en},
     url = {http://geodesic.mathdoc.fr/item/IM2_2001_65_1_a4/}
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Yu. G. Prokhorov. On the classification of Mori contractions: the case of an elliptic curve. Izvestiya. Mathematics , Tome 65 (2001) no. 1, pp. 75-84. http://geodesic.mathdoc.fr/item/IM2_2001_65_1_a4/