Forsberg, R.
Keller, K.
Nielsen, C. S.
Gundestrup, N.
Tscherning, C. C.
Madsen, S. N.
Dall, J.
Article History
Received: 13 January 2000
Revised: 13 July 2000
Accepted: 14 July 2000
First Online: 24 June 2014
Free to read: This content has been made available to all.