1. The evaluation of biological parameters as indicators of purification efficiency in activated sludge plants;Antonietti;Ingegneria Ambientale,1982
2. Standard Methods for Examination of Water and Wastewater;APHA,1985
3. Heavy metal shock load in activated sludge uptake and toxic effects;Battistoni;Wat. Res.,1993
4. The toxicity of various heavy metals salts, alcohols and surfactants to microorganisms in a biodegradation process: a flow microcalorimetry investigation;Beaubien,1984
5. Microfauna of an activated sludge pilot plant treating effluents from a pharmaceutic industry;Becares,1991