Conceptual Model of Information System for Drone Monitoring of Trees' Condition. - Vasyl Lytvyn; Alina Dmytriv; Andriy Berko; Vladislav Alieksieiev; Taras Basyuk; Jörg Rainer Noennig; Dmytro Peleshko; Taras Rak; Viktor Voloshyn (COLINS, 2020)