Test Procedures of Mobile Air Cleaning Devices - First Experiences and ResultsChristian Friebe, Ralph Krause, Ralf Heidenreich, Stefan Holfeld, Hanes Rosenbaum, Karsten Hackeschmidt and Rebekka GruttnerE3S Web Conf., 343 (2022) 03004DOI: https://doi.org/10.1051/e3sconf/202234303004