1. Department of Physics and Astronomy, University of New Mexico, 800 Yale Blvd NE, Albuquerque, New Mexico 87131
2. Independent Consultant, 7026 Calcaterra Dr., San Jose, California 95120
3. Moscow State Institute of Electronics and Mathematics, Bol. Trechsvyatitel. per., 3, Moscow, Russia
4. Department of Physics, Missouri University of Science & Technology, 1315 North Pine Street, Rolla, Missouri 65409-06403
5. Chemical Engineering Department, Gavett Hall, University of Rochester, Rochester, New York 14627