Reference
Peter Tropper, Fritz [Friedrich] Finger, Urs S. Klötzli, Andreas Piber, Sonja Gangl (2016): The Kellerjoch Gneiss (Tyrol, Eastern Alps): An Ordovician pluton with
A-type affinity in the crystalline basement nappes north of the Tauern
Window – Austrian Journal of Earth Sciences – 109_2: 178 - 188.