Thrane, E. V., Blix, T. A., Hall, C., Hansen, T. L., von Zahn, U., Meyer, W., Czechowsky, P., Schmidt, G., Widdel, H.-U., & Neumann, A. (1987). Small Scale Structure and Turbulence in the Mesosphere and Lower Thermosphere at High Latitudes in Winter. Journal of Atmospheric and Terrestrial Physics, 49, 751-762.