1. Moskvitch K, Agricultural drones: the new farmers' market, 21st Aug 2015: http://eandt.theiet.org/magazine/2015/07/farming-drones.cfm
2. Association for Unmanned Vehicle Systems International (AVUSI): http://www.auvsi.org/home
3. FarmPressBlogs—dated: several
4. senseFly, 25th Aug 2015: https://www.youtube.com/user/senseFly
5. Jiménez-Donaire V, Kuang B, Waine T, Mounem Mouazen A, Optimising calibration of on-line visible (vis) and near infrared (NIR) sensor for measurement of key soil properties in vegetable crop fields. EGU general assembly conference abstracts 16, 927