Maul, E.; Eibach, R. (1999). "Vitis International Variety Catalogue". Information and Coordination Centre for Biological Diversity (IBV) of the Federal Agency for Agriculture and Food (BLE), Deichmanns Aue 29, 53179 Bonn, Germany. Archived from the original on April 11, 2007. Retrieved May 5, 2007.
Radden, Rosemary. "Grapes and Wines of the World". The State Library of South Australia, GPO Box 419, Adelaide SA 5001. Archived from the original on August 7, 2007. Retrieved May 5, 2007.
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Radden, Rosemary. "Grapes and Wines of the World". The State Library of South Australia, GPO Box 419, Adelaide SA 5001. Archived from the original on August 7, 2007. Retrieved May 5, 2007.
Maul, E.; Eibach, R. (1999). "Vitis International Variety Catalogue". Information and Coordination Centre for Biological Diversity (IBV) of the Federal Agency for Agriculture and Food (BLE), Deichmanns Aue 29, 53179 Bonn, Germany. Archived from the original on April 11, 2007. Retrieved May 5, 2007.