Callomon, John H., T. Desmond Donovan, and Rudolf Trümpy. “An Annotated Map of the Permian and Mesozoic Formations of East Greenland”. Meddelelser om Grønland 168, no. 3 (June 23, 1972): 1–35. Accessed December 28, 2025. https://tidsskrift.dk/meddrgroenland/article/view/160474.