Galium bulgaricum SynonymySource: Marhold, K. (2011+): Rubiaceae (pro parte majore). – In: Euro+Med Plantbase - the information resource for Euro-Mediterranean plant diversity.Galium bulgaricum Velen., Fl. Bulg.: 231. 1891ContentDistribution Bibliography Distribution Bu Tu(E) Euro+Med: Bulgaria nativeA; Turkey (Turkey-in-Europe nativeA) Bibliography A. Tutin, T. G., Heywood, V. H., Burges, N. A., Valentine, D. H., Walters, S. M. & Webb, D. A. 1964–1980: Flora europaea 1-5. – Cambridge: Cambridge University Press