He obtained the dr. philos. degree in 1978, with a dissertation on the Ugaritic language in two volumes titled Die Partikeln des Ugaritischen (Kevelaer, 1974/1978).
He was born in Dønna, and graduated as dr.philos. with the treatise The novelist as short story writer : a study of William Faulkner's short stories with special emphasis on the period 1928-1932 at the University of Oslo.
She took the dr.philos. degree in 1962 on the thesis Adoratio Crucis. The Regularis Concordia and the Decreta Lanfranci about the Regularis Concordia.
He took the dr.philos. degree in 1970, and was appointed as professor at the Norwegian Institute of Technology in 1981.
He took the dr.philos. degree in 1989, and was appointed as a professor of landscape ecology at the University of Oslo in 1992.
He received the dr.philos. degree from the University of Kristiania in 1908, with the thesis Kunstneren i den græske kunst, about Greek art.