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2. H. Murakami, T. Kobayasi andH. Inaba, Digest of the Fall Meeting of the Japan Society of Applied Physics, paper 3a-N-1 (1978) (in Japanese).
3. H. Murakami, T. Suzuki, T. Kobayasi andH. Inaba, Digest of the Fall Meeting of the Physical Society of Japan, paper 4a-DS-10 (1978) (in Japanese).
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5. T. Suzuki, A. Yamagishi andH. Inaba,Opt. Quant. Electron. 13 (1981) 225?9.