Kostov, Konstantin Simeonov, Nikolai Dobrev, Josef Stemberk, Miloš Briestenský, and Plamen Ivanov. 2018. “Monitoring of Microdisplacements in Golyamata Tsepnatina Cave, Madara Plateau, NE Bulgaria”. Acta Carsologica 47 (1). Ljubljana, Slovenija. https://doi.org/10.3986/ac.v47i1.5149.