Trolove, Michael R., and Paul Shorten. “Comparison of Four off-the-Shelf Unmanned Aerial Vehicles (UAVs) and Two Photogrammetry Programmes for Monitoring Pasture and Cropping Field Trials”. New Zealand Plant Protection 72 (July 27, 2019): 185–194. Accessed August 29, 2026. https://journal.nzpps.org/index.php/nzpp/article/view/285.