Ramovš, A., and B. Jurkovšek. “Middle Carboniferous Pebbles and Cobbles from the Trogkofel Quartz Conglomerate at Podlipoglav”. Geologija, vol. 19, no. 1, Dec. 1976, pp. 35-44, https://www.geologija-revija.si/index.php/geologija/article/view/394.