See also: A.N. Zinov’ev, A.P. Shergin, A.B. Tolstoguzov
PACS: 32.80.Zb, 34.20.-b, 34.35.+a, 34.50.-s, 34.50.Bw, 34.80.Dp, 52.20.Hv, 61.85.+p