1. P.T. Moseley, B.C. Tofield, Solid State Gas Sensors, Adam Hilger, Bristol, 1987, pp. 17–31.
2. Figaro Engineering, Figaro Gas Sensors Products Catalogue, April, 1995.
3. J.W. Gardner, Microsensors: Principles and Applications, Wiley, Chicester, 1994, p. 331.
4. An integrated low-power thin-film CO gas sensor on silicon;Demarne;Sensors and Actuators,1991
5. A.C. Pike, Ph.D. thesis, University of Warwick, Coventry, 1996.