Stamenova, Borislava (24 March 2021). "Боряна Калейн: Шампионка в няколко тома" [Boryana Kaleyn: Champion in several volumes]. btvnovinite.bg (in Bulgarian). Archived from the original on 7 May 2021. Retrieved 20 July 2021.
Stamenova, Borislava (24 March 2021). "Боряна Калейн: Шампионка в няколко тома" [Boryana Kaleyn: Champion in several volumes]. btvnovinite.bg (in Bulgarian). Archived from the original on 7 May 2021. Retrieved 20 July 2021.