by Antonov, R. A., Besshapov, S. P., Bonvech, E. A., Galkin, V. I., Dzgatdoev, T. A., Petkun, A. S., Podgrudkov, D. A., Roganova, T. M., Sysoeva, T. I., Finger, Mik, Finger, Mir, Chernov, D. V., Shaulov, S. B.
Published in Bulletin of the Russian Academy of Sciences. Physics (01.06.2011)