1. Kasanka Trust Ltd;Anonymous;Kasanka Trust Newsletter,2010
2. Anonymous 2012 ArcGIS Desktop: release 10.1
3. Anonymous 2014a 6th-11th March 2014 The Yucatan Peninsula, Mexico part 2. Chichen Itza, Felipe Carillo Puerto and Calakmul https://gryllosblog.wordpress.com/2014/05/10/6th-11th-march-2014-the-yucatan-peninsula-mexico-part-2-chichen-itza-felipe-carillo-puerto-and-calakmul/
4. Anonymous 2014b Back in cyber-space again!!! Report from Khao Yai! http://orientbirding.com/blog/back-in-cyber-space-again-report-from-khao-yai/
5. Anonymous 2014c The Yucatan, Mexico http://www.birdholidays.co.uk/Yucatan.birdwatching.holiday.htm