A criterion for a rational projectively normal variety to be almost-factorial
Rendiconti del Seminario Matematico della Università di Padova, Tome 79 (1988), pp. 281-296 
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     author = {Gattazzo, Remo},
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     pages = {281--296},
     year = {1988},
     publisher = {Seminario Matematico of the University of Padua},
     volume = {79},
     mrnumber = {964036},
     zbl = {0731.14028},
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     url = {https://www.numdam.org/item/RSMUP_1988__79__281_0/}
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Gattazzo, Remo. A criterion for a rational projectively normal variety to be almost-factorial. Rendiconti del Seminario Matematico della Università di Padova, Tome 79 (1988), pp. 281-296. https://www.numdam.org/item/RSMUP_1988__79__281_0/

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