1. Button, K.: 2002, ‘City management and urban environmental indicators,’ Ecological Economics 40(2), 217–233
2. City of Halifax Waste Management Information (2005), available at www.halifax.ca/wrms on January 10, 2005.
3. Costa do Sauípe: 2005, Processing the biodegradable waste (in Portuguese), Saneamento Ambiental on-line, São Paulo, No 191 (January 11) www.signuseditora.com.br
4. Fehr, M. and Calcado, M.R.: 2001, ‘Divided collection model for household waste achieves 80% landfill diversion,’ The Journal of Solid Waste Technology and Management 27(1), 22–26
5. Fehr, M. and Castro, M.S.M.V.: 1999, ‘Municipal waste analysis induces management model (in Portuguese),’ Saneamento Ambiental 10(55), 38–41