Peel, J.S. 1988. Stratigraphy and palaeontology of the Holm Dal Formation (late Middle Cambrian), central North Greenland: Introduction. Meddelelser om Grønland. Geoscience. 20, (Dec. 1988), 5–8. DOI:https://doi.org/10.7146/moggeosci.v20i.139885.