Reference
Moses Attrep, Charles J. Orth, Leonard R. Quintana (1991): The Permian-Triassic of the Gartnerkofel-1 Core (Carnic Alps, Austria): Geochemistry of Common and Trace Elements II - INAA and RNAA – Abhandlungen der Geologischen Bundesanstalt in Wien – 45: 123 - 137.