1. Granular sludge in UASB-reactors;De Zeeuw,1988
2. Transformations of some lipids in anaerobic sludge digestion;Heukelekian;Sewage Ind. Wastes,1958
3. Kinetics of anaerobic treatment at reduced temperatures;O'Rourke,1968
4. Formation of granular sludge during anaerobic treatment of wastewater from a rendering plant;De Zeeuw,1982
5. Einsatz des Anaerobverfahrens zur Abtrennung schwer abbaubarer Stoffe;Spies,341985