1. Schlumberger Denmark A/S, Kanalholmen 1, 2650 Hvidovre, Denmark
2. Department of Chemical Engineering, Laval University, 1065 ave. de la Médecine, Québec, Quebec G1V 0A6, Canada
3. Department of Mechanical Engineering, University of British Columbia, 6250 Applied Science Lane, Vancouver, British Columbia V6T 1Z4, Canada
4. Department of Mathematics, University of British Columbia, 1984 Mathematics Road, Vancouver, British Columbia V6T 1Z2, Canada