Nielsen, Troels F. D., et al. “The Pre-Basaltic Sediments and the Lower Basalts at Kangerdlugssuaq, East Greenland: Their Stratigraphy, Lithology, Palaeomagnetism and Petrology”. Meddelelser Om Grønland. Geoscience, vol. 6, July 1981, p. 25 pp., doi:10.7146/moggeosci.v6i.141017.