1. T. C. May, M. H. Woods, 16th Ann. Proc. Intern. Reliabil. Phys. Symp. 1978, Ins. Elec. Electron. Eng. Inc., SanDiego, USA, 1978, p. 33.
2. T. Mitsugashira, Y. Koma, S. Hirai, Y. Okada, N. Kurashima, H. Sakurai, J. Radioanal. Nucl. Chem. 147 (1991) 69.
3. T. Mitsugashira, Y. Koma, S. Hirai, Y. Okada, Sci. Rep. Res. Instit., Tohoku Univ., A35 (1991) 256.
4. T. Mitsugashira, Y. Koma, S. Hirai, Y. Okada, Anal. Sci., 7 (1991) 1255.
5. Y. Okada, S. Hirai, Y. Suzuki, T. Mitsugashira, Sci. Rep. Res. Instit., Tohoku Univ., A40 (1994) 25.