The project was started at the University of Oslo in 1991.

He was a professor at the University of Oslo from 1957 to 1970.

He has been a professor at the University of Oslo since 1978.

He worked as a professor in history at the University of Oslo until 1983.

From 1952 he was professor at the University of Oslo.

In 1997 he became professor at the University of Oslo.

He was a professor at the University of Oslo from 1985 to 1997.

She became a professor at the University of Oslo in 2007.

He was a professor at the University of Oslo from 1972.

He has been professor at the University of Oslo from 1989.