Johnson, Boris (25 January 2012). "London Wildweb site". The London Assembly. Archived from the original on 17 September 2013. Retrieved 17 September 2013.
gigl.org.uk
gigl.org.uk
"About GiGL". Greenspace Information for Greater London. Retrieved 17 September 2013.
Johnson, Boris (25 January 2012). "London Wildweb site". The London Assembly. Archived from the original on 17 September 2013. Retrieved 17 September 2013.