@book { HorizontalConsistencyintheAreasoftheEuropeanUnionsExternalAction, title = "Horizontal Consistency in the Areas of the European Union's External Action", author = "Veronika {Minkova}", year = "2011", publisher = "Diplom.de", address = "Hamburg, Deutschland", doi = "10.3239/9783842821057", url = "https://m.diplom.de/document/228639" }