1. T.K. Gibbs, The gas sensor industry: a UK status report, in: S.J.D. Tait (Ed.), Electrochemical Technology in Industry, 1991, p. 77.
2. D.E. Williams, P. McGeehim, Solid-state gas sensors and monitors, in: D. Pletcher (Ed.), Specialist Periodical Reports in Electrochemistry, Vol. 9, Royal Society of Chemistry, 1989, p. 160.
3. P.T. Moseley, J.O.W. Norris, D.E. Williams (Eds.), Techniques and Mechanisms in Gas Sensing, Adam Hilger, Bristol, 1991.
4. I. Bergman, Metallised membrane sensors, Brit. Patent 1200595, 1970.
5. Amperometric sensor for carbon dioxide: design, characteristics and performance;Evans;Anal. Chem.,1989