Aqil Nizamudin, Adry, and Wan Mazlina Wan Mohamed. “Assessment of Images of Birds Captured by Low-Cost Drone Using Agisoft Photoscan”. International Journal of Engineering & Technology, vol. 7, no. 4.25, Nov. 2018, pp. 141-6, https://doi.org/10.14419/ijet.v7i4.25.22414.