scholarly article by Alexandra Laeng et al published 10 August 2018 in Atmospheric Measurement Techniques
author: Daan Hubert, Bernd Funke, Gabriele Stiller, Manuel López-Puertas, Kaley A. Walker, Thomas von Clarmann, Udo Grabowski, Alexandra Laeng, Norbert Glatthor, Sylvia Kellmann, Lucien Froidevaux, Johannes Plieninger, Arne Babenhauserheide