1. National Bureau of Statistics of China, China Statistical Yearbook, (2009).
2. Environmental Protection Agency, Municipal Solid Waste Generation, Recycling, and Disposal in the United States-Detailed Tables and Figures for 2008, (2009).
3. Landfill management, leachate generation, and leach testing of solid wastes in Australia and overseas;Scott;Crit. Rev. Environ. Sci. Technol.,2005
4. National Environment Agency, Key Environmental Statistics (Singapore), (2013).
5. Ministry of the Environment, State of Discharge and Treatment of Municipal Solid Waste in FY 2003 (Japan), (2005).