Sandholt, P. E.
Moen, J.
Stauning, P.
Holtet, J. A.
Cowley, S. W. H.
Lockwood, M.
Løvhaug, U. P.
Hansen, T.
Egeland, A.
Article History
Received: 8 November 1996
Revised: 29 January 1998
Accepted: 1 May 1998
First Online: 6 June 2014
Free to read: This content has been made available to all.