Lainer, Martin, Klemens Hocke, Ellen Eckert, and Niklaus Kampfer (2019), Significant decline of mesospheric water vapor at the NDACC site near Bern in the period 2007 to 2018, ATMOSPHERIC CHEMISTRY AND PHYSICS, 19(9), 6611-6620, doi:10.5194/acp-19-6611-2019.