1. Bogue, R. (1994) Briefing: Integrated pollution control in the EU. Environmental Sensors, May 6–10, IOP Publishing, Bristol.
2. Klainer, S. M., Goswami, K., Dandge, D. K., Simon, S. J., Herron, N. R., Eastwood, D. L. and Eccles, L. A. (1991) Environmental monitoring applications of fibre optic chemical sensors. Fiber Optic Chemical Sensors, Vol. II (ed. O. S. Wolfbeis), pp. 83–122, CRC Press, Boca Raton, FL.
3. Norris, J. O. W. (1995) Multimodc optical fiber chemical sensors, in Optical Fiber Sensor Technology (eds. K. T. V. Grattan and B. T. Meggitt ), Chapman & Hall, London, pp. 161–196.
4. MacCraith, B. D. (1998) Optical Fiber Chemical Sensor Systems and Devices. Chap. 2 in Optical Fiber Sensor Technology, Vol. 3 (eds. K. T. V. Grattan and B. T. Meggitt), Chapman & Hall, London, pp. 15–46.
5. Cooper, D. E. and Martinelli, R. U. (1992) Near-infrared diode lasers monitor molecular species. Laser Focus World, 28 (11), 133–146.