1. 1964. Bjørke- og Barskogsgrenser i Norge. Hovedoppgave i Naturgeografi, Universitetet i Oslo, 125 pp.
2. , , and 1986. Climatic calibration of coleopteran data. IN: (ed), Handbook of Holocene Palaeoecology and Palaeohydrology, 851–858. Wiley, Chichester.
3. 1950. British Water Beetles, vol. II. The Ray Society, London, 394 pp.