Ramovš, A. “Lower Devonian and Lower Carboniferous Conodonts in the Pebbles of the Lower Permian Conglomerate at Podlipoglav, East of Ljubljana, Yugoslavia”. Geologija, vol. 31, no. 1, June 1988, pp. 233-9, https://www.geologija-revija.si/index.php/geologija/article/view/612.