Knöppel, Hans-Armin Working Group Tropical Ecology, Max Planck Institute for Limnology, Max Planck Institute for Evolutionary Biology, Max Planck Society;
Knöppel, H.-A. (1970). Food of Central Amazonian fishes. Contribution to the nutrient-ecology of Amazonian rain-forest-streams. Amazoniana: Limnologia et Oecologia Regionalis Systematis Fluminis Amazonas, 2(3), 257-352.