Detection of European Aspen (Populus tremula L.) Based on an Unmanned Aerial Vehicle Approach in Boreal Forests. - Anton Kuzmin; Lauri Korhonen; Sonja Kivinen; Pekka Hurskainen; Pasi Korpelainen; Topi Tanhuanpää; Matti Maltamo; Petteri Vihervaara; Timo Kumpula (Remote. Sens., 2021)