Template:Schlagintweit & Sanders, 2007
- Schlagintweit, F. & Sanders, D. 2007. Permocalculus (Pyrulites) theresiensteinensis n. sp., a New Calcareous Alga from the Upper Cretaceous Lower Gosau Subgroup of the Northern Calcareous Alps (Austria). Jahrbuch der Geologischen Bundesanstalt 147(3-4): 607–614. ResearchGate, PDF