Houmark-Nielsen, M., M. Kelly, J. Y. Landvik, and L. Sorby. “The Pre-Holocene Quaternary: Lithostratigraphy and Geomorphic Evidence”. Meddelelser Om Grønland. Geoscience, vol. 22, Jan. 1990, pp. 8-18, doi:10.7146/moggeosci.v22i.140141.