1. W. G�pel, in:Sensors: a Comprehensive Survey, Vol. 2, Part I (W. G�pel, J. Hess, J. N. Zemel, eds.), VCH, Weinheim, 1991.
2. K. H. Karmarkar, G. G. Guilbault,Anal. Chim. Acta 1974,71, 419.
3. O. F. Filho, J. F. de Andrade, A. A. Suleiman, G. G. Guilbault,Anal. Chem. 1989,61, 746.
4. R. Lucklum, B. Henning, P. Hauptmann, K. D. Schierbaum, S. Vaihinger, W. G�pel,Sens. Actuators 1990,A25?27, 705.
5. J. Janata,Principle of Chemical Sensors, Plenum, New York, 1989, p. 78.