“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)”. Годишник на УНСС, vol. 1, Feb. 2021, p. 139-65, https://ojs.e-dnrs.org/ybunwe/article/view/1437.