Schmidt, H. The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society; Middle and Upper Atmosphere, The Atmosphere in the Earth System, MPI for Meteorology, Max Planck Society;
She, C. Y., Krueger, D. A., Akmaev, R., Schmidt, H., Talaat, E., & Yee, S. (2009). Long-term variability in mesopause region temperatures over Fort Collins, Colorado (41 degrees N, 105 degrees W) based on lidar observations from 1990 through 2007. Journal of Atmospheric & Solar-Terrestrial Physics, 71, 1558-1564.