1. Marlier, G., Amazonia 1–2, 91–115 (1973).
2. Irion, G., Trop. Ecol. 23, 76–85 (1982).
3. Sioli, H., Atlas Simp. Sobre a Biota Amazonica 3, 9–50 (1967).
4. Hill, G. & Rai, H. Arch. Hydrobiol. 96, 99–105 (1982).
5. Connell, J. H. Science 199, 1302–1310 (1978).