1. State Technical University Polytechnicheskaya 29, St. Petersburg, 195251, Russia (812)552-7954
2. Max Plank Institut für Plasmaphysik Boltzmanstrasse 2, Garching, D-8046, Germany (089)3299-2580
3. National Institute for Fusion Science Furo-cho, Chikusa-ku, Nagoya, 464-01, Japan (81)52-781-5135