Larsen, P.-H, and J.C Escher. 1987. “Additions to the Lithostratigraphy of the Peary Land Group (Silurian) in Western and Central North Greenland”. Rapport Grønlands Geologiske Undersøgelse 133 (December). Copenhagen, Denmark:65-80. https://doi.org/10.34194/rapggu.v133.7976.