See also: L.V. Grigorenko, G.V. Trubnikov, Yu.L. Parfenova, V.V. Parkhomchuk, S.M. Polozov, M. Pfutzner, S.I. Sidorchuk, H. Simon, R.S. Slepnev, G.M. Ter-Akopian, V. Chudoba, I.G. Mukha, K. Scheidenberger, P.Yu. Shatunov, Yu.M. Shatunov
PACS: 21.10.Ft, 29.20.-c, 29.25.Rm