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