DONNÉES DE L’UNION EUROPÉENNE: https://ec.europa.eu/info/food-farming-fisheries/food-safety-and-quality/certification/quality-labels/geographical-indications-register/tdt

THE WINES OF BULGARIA, ROMANIA AND MOLDOVA, Caroline Gilby. LIVRE. 

BULGARIAN WINE: https://en.wikipedia.org/wiki/Bulgarian_wine

BULGARIA: https://www.jancisrobinson.com/learn/wine-regions/bulgaria

WINES OF BULGARIA: https://www.europeanwinetreasures.com/

WINES OF BULGARIA: https://wineguide.wein.plus/wine-regions/bulgaria

THE WINE GRAPES. Jancis Robinson et. al. LIVRE

VITIS CATALOGUE: https://www.vivc.de

THE WINE ROUTES OF BULGARIA:© 2014 VinoZona

BULGARIAN WINE: https://www.wine-searcher.com/regions-bulgaria