Maul, E.; Dr. R. Eibach.„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 (2007-yil 31-may). 2012-yil 27-martda asl nusxadan arxivlangan. Qaraldi: 2007-yil 15-aprel.
webcitation.org
Maul, E.; Dr. R. Eibach.„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 (2007-yil 31-may). 2012-yil 27-martda asl nusxadan arxivlangan. Qaraldi: 2007-yil 15-aprel.