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2. W. Buhrer, R. Gottardt, A. Kulik andO. Mercier, ibid.43 (1982) 219.
3. S. Miyazaki, Y. Ohmi, K. Otsuka andY. Suzuki, ibid.43 (1982) 255.
4. T. Saburi, T. Tatsumi andS. Nenno, ibid.43 (1982) 261.
5. Z. Lekston, PhD thesis, Silesian University, Poland (1985).