Cardich-Loarte, L. A., and E. Schroll. “The Geochemistry of Strontium in the Lead-Zinc Ore Minerals of the Bleiberg-Kreuth Type and Its Relation to the Ore Genesis”. Geologija, vol. 15, no. 1, Dec. 1972, pp. 337-42, https://www.geologija-revija.si/index.php/geologija/article/view/1616.