Nilsson, I., E. Håkansson, L. Madsen, S. Pedersen, and L. Stemmerik. “Stratigraphic Significance of New Fusulinid Samples from the Upper Palaeozoic Mallemuk Mountain Group, North Greenland”. Rapport Grønlands Geologiske Undersøgelse, vol. 150, Jan. 1991, pp. 29-32, doi:10.34194/rapggu.v150.8137.