 He headed the Scandinavian Institute of Maritime Law from 1973 to 1988. Notable works include "The Freight Risk", "Fra transportrettens og kjøpsrettens grenseland" (2nd edition 1975) and "Kjøpsrett" (3rd edition 2006).He chaired a transport committee in the United Nations Conference on Trade and Development from 1973 to 1978, was an ad hoc judge in the EFTA Court from 1997 to 2001 as well as an arbitration court judge in Norway.He has chaired several committees delivering Norwegian Official Reports.