1. Norske Skog Saugbrugs, N-1756 , Halden , Norway
2. Paper and Fibre Research Institute (PFI), NO-7491 , Trondheim , Kristiania, Norway
3. University of British Columbia, Mechanical Engineering Dept., Pulp and Paper Centre , Vancouver , British Columbia, Canada
4. Andritz Inc., 3200 Upper Valley Pike, Springfield , Ohio , USA