N. Swarnalingam, W. K. Hocking, W. Singer, and R. Latteck. Calibrated measurements of PMSE strengths at three different locations observed with SKiYMET radars and narrow beam VHF radars. J. Atmos. Solar-Terr. Phys., volume 71, issue 1, pages 1807-1813,  2009 .

R. Latteck, W. Singer, R. J. Morris, W. K. Hocking, D. J. Murphy, D. A. Holdsworth, and N. Swarnalingam. Similarities and differences in polar mesosphere summer echoes observed in the Arctic and Antarctica. Ann. Geophys., volume 26, issue 9, pages 2795-2806,  2008 .