1. Idaho National Engineering and Environmental Laboratory PO Box 1625, Idaho Falls, ID 83415-7113
2. Forschungszentrum Karlsruhe Institut für Kern- und Energietechnik Postfach 3640, D-76021 Karlsruhe, Germany
3. Bochvar All-Russian Research Institute of Inorganic Materials (VNIINM) Moscow, Russia