1. T. Yao and T. Wasa, Anal Chim. Acta, 175 (1985) 301.
2. T. Yao, Y. Matsumoto and T. Wasa, J. Flow Injection Anal., 4 (1987) 112.
3. T. Yao and T. Wasa, Anal. Chim. Acta, 207 (1988) 319.
4. T. Yao, Y. Matsumoto and T. Wasa, Electroanalysis, 1 (1989) 173.
5. T. Yao, Y. Matsumoto and T. Wasa, J. Flow Injection Anal., 6 (1989) 37.