1. 1) K. Fukui, Sensors and Actuators B, 5, 27 (1991).
2. 2) For example, J. W. Gardner and P.N. Bartlett, Sensor and Actuators B, 18-19, 211 (1994).
3. 3) N. Miura, J. Tamaki, and N. Yamazoe, Hyomen, 28, 15 (1990).
4. 4) N. Yamazoe and N. Miura, Chemical Sensor Technology Vol. 4 (Ed. S. Yamauchi), Kodansha, Tokyo, p.19 (1992).
5. 5) J. Tamaki, Hyomen, 34, 737 (1996).