Márton, M., F. Markolt, L. Szabó, and M. Heltai. “Burrow Densities of Eurasian Badger (Meles Meles) and Red Fox (Vulpes Vulpes) in Börzsöny Mointains”. Review on Agriculture and Rural Development, vol. 2, no. 1, Jan. 2013, pp. 79-84, https://ojs.bibl.u-szeged.hu/index.php/rard/article/view/13286.