1. Effect of type of waste on performance of anaerobic fixed film and upflow sludge bed reactors;Van den Berg,1981
2. Anaerobic treatment of sewage in UASB reactors at temperatures from 9–20°C;Grin,1985
3. Anaerobic treatment of low strength wastewater;Lettinga;H2O,1974
4. Use of the upflow blanket (USB) reactor concept for biological wastewater treatment, especially for anaerobic treatment;Lettinga;Biotechnology & Bioengineering,1980
5. One hundred years of anaerobic digestion;McCarty,1981