See also: H.V. Malova, L.M. Zelenyi, A.I. Neishtadt, D.L. Vainchtein, A.A. Petrukovich, R. Nakamura
PACS: 52.20.Dq, 52.40.Kh, 94.05.-a, 52.30.Cv, 52.35.Py, 52.35.Vd