1. Pennsylvania State University, 201 Transportation Research Building, University Park, PA 16802
2. Elf-Antar France, Elf Research Center, BP22, 69360 Solaize, France
3. University of Minnesota, 500 Pillsbury Drive SE, Minneapolis, MN 55455
4. Total Fina Elf, 51, Esplande du Général de Gaulle, 92907 Paris La Défense Cedex, France
5. Total Fina Elf, Elf Research Center, BP22, 69360 Solaize, France