Sources:
- Piotr Włodarczak, Stefan Alexandrov: , Early Bronze Age barrows in Upper Thrace, in : From the Steppes to the Balkans Yamna Culture in Upper Thrace, Budapest 2024
- https://www.academia.edu/36860758/%D0%9C_%D0%A2%D0%BE%D0%BD%D0%BA%D0%BE%D0%B2%D0%B0_%D1%80%D0%B5%D0%B4_%D0%A2%D1%80%D0%B0%D0%BA%D0%BE_%D1%80%D0%B8%D0%BC%D1%81%D0%BA%D0%B8_%D0%B4%D0%B8%D0%BD%D0%B0%D1%81%D1%82%D0%B8%D1%87%D0%B5%D0%BD_%D1%86%D0%B5%D0%BD%D1%82%D1%8A%D1%80_%D0%B2_%D1%80%D0%B0%D0%B9%D0%BE%D0%BD%D0%B0_%D0%BD%D0%B0_%D0%A7%D0%B8%D1%80%D0%BF%D0%B0%D0%BD%D1%81%D0%BA%D0%B8%D1%82%D0%B5_%D0%B2%D1%8A%D0%B7%D0%B2%D0%B8%D1%88%D0%B5%D0%BD%D0%B8%D1%8F_%D0%A1%D0%BE%D1%84%D0%B8%D1%8F_2011