1. Thomas V. M. 2003. Product self-management: evolution in recycling and reuse. Environmental science & technology 37 23 (2003) 5297--5302. Thomas V. M. 2003. Product self-management: evolution in recycling and reuse. Environmental science & technology 37 23 (2003) 5297--5302.
2. Flora A. 2009. Towards a clean environment: A proposal on sustainable and integrated solid waste management system for universiti Kebangsaan Malaysia. Report from Alam Flora (2009). Flora A. 2009. Towards a clean environment: A proposal on sustainable and integrated solid waste management system for universiti Kebangsaan Malaysia. Report from Alam Flora (2009).