1. Jet Propulsion Laboratory; California Institute of Technology; Pasadena California USA
2. Space Research Institute, RAS; Moscow Russia
3. Lunar and Planetary Laboratory; University of Arizona; Tucson Arizona USA
4. University of Tennessee; Knoxville Tennessee USA
5. S. I. Vernadsky Institute for Geochemistry and Analytical Chemistry; Moscow Russia
6. Joint Institute for Nuclear Research; Dubna Russia