Beron, P. (2001): Etude comparative des faunes cavernicoles de la Bulgarie et de la Grèce. Historia naturalis bulgarica, 13: 53-68.
Beron, P. (2008): High-altitude Isopoda, Arachnida and Myriapoda in the Old World. Pensoft Publishers, Sofia-Moscow.
Beron, P., (2006): Plant and animal life in Bulgarian caves. In: Beron, P., Daaliev, T., Jalov, A.: Caves and speleology in Bulgaria. Pensoft Publishers, Bulgarian Federation of Speleology, National Museum of Natural History, Sofia: 40-60.
Beron, P., Daaliev, T., Jalov, A. (2006):Caves and speleology in Bulgaria. Pensoft Publishers, Bulgarian Federation of Speleology, National Museum of Natural History, Sofia.
Beron, P., Petrov, B., Stoev, P. (2004): The invertebrate cave fauna of the Eastern Rhodopes (Bulgaria and Greece). In: Beron P., Popov A. (eds). Biodiversity of Bulgaria. 2. Biodiversity of Eastern Rhodopes (Bulgaria and Greece). Pensoft & Nat. Mus. Natur. Hist., Sofia: 791-822.