Exploitation of Multi-Band Lidar for the Classification of Free-Flying Migratory Birds: A Pilot Study Over Athens, GreeceSamuel Jansson, Alexandros Papayannis, Susanne Åkesson, Georgios Tsaknakis and Mikkel BrydegaardEPJ Web of Conferences, 119 (2016) 27002DOI: https://doi.org/10.1051/epjconf/201611927002