Astapov, A., K. Prishutov, I. Krivolapov, S.Y. Astapov, and A. Korotkov. 2019. “Unmanned Aerial Vehicles for Estimation of Vegetation Quality”. Amazonia Investiga 8 (23), 27-36. https://www.amazoniainvestiga.info/index.php/amazonia/article/view/839.