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. 2021;(1):139-165. Accessed July 22, 2026. https://bjiep.e-dnrs.org/index.php/yb/article/view/5949