Monitoring of the Operating Parameters a Low-Temperature Fuel-Cell Stack for Applications in Unmanned Aerial Vehicles: Part IMagdalena Dudek, Andrzej Raźniak, Bartłomiej Lis, Tomasz Siwek, Bartosz Adamczyk, Dagmara Uhl, Wojciech Kalawa and Tadeusz UhlE3S Web Conf., 108 (2019) 01029DOI: https://doi.org/10.1051/e3sconf/201910801029