H.Morinaga1, J.Imazato2, M.Yanokura3, T.Nomura4, M.Ishihara4 Technische Universitaet Muenchen1 Univ. of Tokyo, Tokyo2 Tokyo Metropolitan Univ., Hachioji, Tokyo3 Inst.of Physical and Chemical Res. (RIKEN4
Journal of the Physical Society of Japan48(1980)687