1. Bird P.M., Rapport D.J. (1986) State of the Environment Report for Canada. Canadian Government Publishing Centre 264 pp.
2. Bormann F.H., Likens G.E. (1979) Pattern and Process in a Forested System. Springer-Verlag, New York
3. Brown L.R., Flavin C. and Postel (1989) A world at risk. In Brown et al. (eds.) State of the World. A Worldwatch Institute Report on Progress Toward a Sustainable Society. W.W. Norton and Co., New York
4. Cairns Jr. J. (1991) Will integrative science develop with sufficient rapidity to mitigate global environmental degradation? Speculations in Science and Technology 15 (l): 54–59
5. Callicott J.B. (1992) Aldo Leopold’s metaphor. In Costanza R, Norton B., Haskell B. (eds.) Ecosystem Health - New Goals for Environmental Management. Island Press, Washington DC