1. Allen, T.F.H. and Hoekstra, T.H. (1992) Toward a Unified Ecology New York: Columbia University Press.
2. Allen, T.F.H. and Starr, T.B. (1982) Hierarchy: Perspectives for Ecological Complexity. Chicago: Chicago University Press.
3. Allen, T.F.H., O'Neill, R.V. and Hoekstra, T.H. (1987) Interlevel relations in ecological research and management: some working principles from hierarchy theory. J. App. Syst. Anal. 14, 63?79.
4. Anderson, J.B., Smith, M.L. and Bruhn, J.N. (1994) Relatedness and spatial distribution of Armillaria genets infecting red pine seedlings. Phytopath. 84, 822?9.
5. Andrews, J.H. (1991) Comparative Ecology of Microoganisms and Macroorganisms. New York: Springer-Verlag.