1. Bear J., 1979. Hydraulics of Groundwater, McGraw-Hill.
2. Bogner J., Spokas K., 1995. Effect of Leachate Recirculation on Landfill Gas Production and Leachate Quality: A Controlled Laboratory Study, US Department of Energy, National Renewable Energy Laboratory, NREL/TP-430-7973, May.
3. Chapra S.C., 1977. Surface water-quality modelling, McGraw-Hill.
4. Clarke R.H., Speece R.E., 1971. The pH tolerance of anaerobic digestion, Proc. 5th Int. Conf. On Water Pollution Research II-27, 1-4.
5. Department of the Environment, 1994. Waste Management Paper 26A-Landfill completion, The Stationery Office.