1. Brossia, C, & S. Wu, 1990. Low-cost in-soil organic contaminant sensor. SPIE Vol. 1368: Chemical, Biochemical, and Environmental Fiber Sensors II, pp. 115–12
2. Carter, K., 1992. On-site Screening Speeds Sample Analysis. Pollution Engineering, March 15, 1992, pp. 36-38.
3. Danish EPA, 1990. Risikovurdering af Forurenede Grunde, MiljØprojektnr. 123 (in Danish with English summary).
4. Danish EPA, in press. A catalogue of test methods prepared by Henrietta Blichfeldt and Loren Ramsay (in Danish with English summary).
5. Gilbert, R.O., 1987. Statistical Methods for Environmental Pollution Monitoring. Van Nostrand Reinhold Company, New York, p. 122.