(4) Wierich P. and Gerike P., The Fate of Soluble, Recalcitrant, and Absorging Compounds in Activated Sludge Plants, Ecotoxicology and Enviromental Safety, Vol 5, Nr. 2 - June 1981, str. 161 - 171.
(4) Wierich P. and Gerike P., The Fate of Soluble, Recalcitrant, and Absorging Compounds in Activated Sludge Plants, Ecotoxicology and Enviromental Safety, Vol 5, Nr. 2 - June 1981, str. 161 - 171.