See also: A.I. Lipkin, R.S. Nakhmanson, A.M. Pilan, G.B. Lesovik, I.Z. Tsekhmistro, M.B. Menskii, D.M. Podorozhnyi, A.N. Turundaevskii
PACS: 03.65.Yz, 96.50.S-