1. Ahlf W, Irmer U, Weber A (1980) Accumulation of lead by fresh water algae under various conditions. Z Pflanzenphysiol 100:197?207
2. Allen MB (1959) Studies with Cyanidium caldarium an anomalously pigmented chlorophyt. Arch Microbiol 32:270?277
3. Calmano W, Ahlf W, Förstner U (1983) Haevy metal removal from contaminated sludges with dissolved sulfur dioxide in combination with bacterial leaching. Proc Int Conf Heavy Metals in the Environment, pp 952?955
4. Lafraie MA, Betz A (1985) Anaerobic fermentation in Cyanidium caldarium. Planta 163:38?42
5. Peters RW, Ku Y (1986) The effect of citrate, a weak chelating agent, on the removal of heavy metals by sulfide precipitation. Int Symp on Metal Speciation, Separation and Recovery. July 27?Aug. 1, Chicago, pp 53?82