Röttger, J. MPI for Aeronomy, Max Planck Institute for Solar System Research, Max Planck Society;
Link (Any fulltext)
Kuo, F. S., & Röttger, J. (2005). Horizontal wavelength of gravity waves in the lower atmosphere measured by the SOUSY Svalbard Radar. Chin. J. Phys., 43(3), 464-480.