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