Santillo, D., Johnston, P., & Stringer, R.L. (1999). The Precautionary Principle in Practice: a Mandate for Anticipatory Preventative Action. In Protecting Public Health and the Environment: Implementing the Precautionary Principle, C. Raffensperger and J. Tickner [Eds], Island Press, ISBN: 1-55963-688-2: 36-50. (invited paper).