1. W. Gopel, Sens. Actuators B 16, 167 (1989).
2. J. Watson, K. Ihokura, and G. S. V. Coles, Mater. Sci. Technol. 4, 711 (1993).
3. T. Hirayashi, Sens. Technol. 6, 78 (1986).
4. G. McCarthy and J. Welton, Powder Diffr. 4, 156 (1989).
5. R. M. Voshchilova, D. P. Dimitrov, N. I. Dolotov, et al., Fiz. Tekh. Poluprovodn. (St. Petersburg) 29(11), 1987 (1995) [Semiconductors 29, 1036 (1995)].