1. Alberti, M., Marzluff, J. M., Shulenberger, E., Bradley, G., Ryan, C., & Zumbrunnen, C. (2003). Integrating humans into ecology: Opportunities and challenges for studying urban ecosystems. BioScience, 53, 1169–1179.
2. Allen-Wardell, G., Bernhardt, P., Bitner, R., Burquez, A., Buchmann, S., Cane, J., Cox, P. A., Dalton, V., Feinsinger, P., Ingram, M., Inouye, D., Jones, C. E., Kennedy, K., Kevan, P., Koopowitz, H., Medellin, R., Medellin-Morales, S., Nabhan, G. P., Pavlik, B., Tepedino, V., Torchio, P., & Walker, S. (1998). The potential consequences of pollinator declines in the conservation of biodiversity and stability of food crop fields. Conservation Biology, 12, 1–11.
3. Banting, D., Doshi, H., Li, J., & Missios, P. (2005). Report on the environmental benefits and costs of green roof technology for the city of Toronto, Prepared for city of Toronto and Ontario Centres of Excellence—Earth and Environmental Technologies (OCE-ETech). Available from
http://www.toronto.ca/greenroofs/pdf/fullreport103105.pdf
. Accessed 16 May 2011.
4. CABE. (2011). Chicago urban forest. Available from http://webarchive.nationalarchives.gov.uk/20110118095356/http:/www.cabe.org.uk/case-studies/chicago-urban-forest. Accessed 10 May 2011.
5. Council of the EU. (2010). Biodiversity: Post-2010 EU and global vision and targets and international ABS regime—Council Conclusions. Available at
http://register.consilium.europa.eu/pdf/en/10/st07/st07536.en10.pdf
. Accessed 10 Feb 2011.