Stouge, Svend, Douglas W. Boyce, Jørgen Christiansen, David A.T. Harper, and Ian Knight. 2001. “Vendian – Lower Ordovician Stratigraphy of Ella Ø, North-East Greenland: New Investigations”. Geology of Greenland Survey Bulletin 189 (October):107-14. https://doi.org/10.34194/ggub.v189.5164.