1. Standard Methods for the Examination of Water and Waste Water;American Public Health Association,1975
2. Anaerobic fermentations of semi-solid and solid substrates;De Baere,1984
3. Dry anaerobic fermentation of concentrated substrates;De Boosere,1986
4. Acclimatization of anaerobic sludge for UASB-reactor start-up;De Zeeuw,1984
5. Solubilization of particulate organic carbon during the acid phase of anaerobic digestion;Eastman;Journal WPCF,1981