@book{23151,
	author = {de Groot, Wim, ed.},
	title = {Advanced Sensors and Monitors for Process Industries and the Environment},
	publisher = {SPIE},
	year = {1999},
	series = {Proceedings of SPIE; V. 3535},
	address = {Washington, USA},
	url = {https://www.spiedigitallibrary.org/conference-proceedings-of-spie/3535}
}