1. AECEN, 2006. Environmental Compliance and Enforcement in Sri Lanka: Rapid Assessment. Asian Environmental Compliance and Enforcement Network, USAID, Sri Lanka
2. On estimating the industry production function;Aigner;Am. Econ. Rev.,1968
3. The Theory of Environmental Policy;Baumol,1988
4. Changing global water management landscape;Biswas,2009
5. Colombia’s discharge fee program: Incentives for polluters or regulators?;Blackman;J. Environ. Manag.,2009