Chu, X., C. Yamashita, P. J. Espy, G. J. Nott,
E. Jensen, H.-L. Liu, W. Huang, and
J. Thayer (2002), Response of polar mesospheric cloud brightness to stratospheric gravity waves at the South Pole and Rothera, Antarctica,
JASTP, 71, 434-445, doi:10.1016/j.jastp.2008.10.002.