1. a Sanda Plant, Mitsubishi Materials Corporation , 12–6 Technopark, Sanda, Hyogo, 669-1322, Japan
2. b Central Research Institute, Mitsubishi Materials Corporation , 1–297 Kitabukuro-cho, Omiya, Saitama, 330-8508, Japan
3. c Symetrix Corporation , 5055 Mark Dabling Blvd., Colorado Springs, Colorado, 80918, USA