Valkov I. Methodologies for Measuring Media Freedom. The Bulgarian Case (Comparative Analysis of the Methodologies Used by Freedom House, Reporters Without Borders, CMPF, IREX, and AEJ-Bulgaria). YB [Internet]. 2021 Feb. 14 [cited 2026 Jul. 22];(1):139-65. Available from: https://bjiep.e-dnrs.org/index.php/yb/article/view/5949