CZERNICKA, Marzena. International Context of the Polish-Bulgarian Relations between 1990–2007: Analysis of the Documents Available in the Archive of the Polish MFA . Historia i Polityka. Online. 15 October 2021. No. 37 (44), pp. 25-41. [Accessed 6 July 2025]. DOI 10.12775/HiP.2021.022.