1. Igneous and fossiliferous sedimentary drift pebbles in marine Tertiary of Torell Land, Spitsbergen;Birkenmajer;Nor. Polarist. Arb.,1972
2. An ecological reconnaissance in the native home of Metasequoia glyptostroboides;Chu;Ecology,1950
3. Die fossilen Holzreste von Spitzbergen;Gothan;K. Sven. Vetensk. Akad. Handl.,1910
4. Studies in the Tertiary flora of Spitbergen, with notes on Tertiary floras of Ellesmere Island, Greenland and Iceland;Manum;Nor. Polarinst. Skr.,1962
5. Alttertiäre Pflanzen aus Flözen der Brøgger-Halbinsel Spitzbergens;Schloemer-Jaeger;Palaeontographica,1958