Presetnik, Primož, and Nataša Zupančič. “Bats in Hibernacula of Bela Krajina (southeastern Slovenia) in the Winter of 2001-2002”. Natura Sloveniae, vol. 8, no. 1, June 2006, pp. 33-42, https://doi.org/10.14720/ns.8.1.33-42.