Jansen, E.; Bleil, U.; Henrich, R.; Kringstad, L.; Slettemark, B. (1988): Paleoenvironmental changes in the Norwegian Sea and the Northeast Atlantic during the last 2.8 m.y.; Deep Sea Drilling Project/Ocean Drilling Program sites 610, 642, 643 and 644. American Geophysical Union, Washington, DC, United States, In: Thiede, Joern (prefacer), Vorren, Tore O. (prefacer), Special section on Polar seas geological record, 3 (5), 563-581, georefid:1990-009177