@phdthesis{oai:nagoya.repo.nii.ac.jp:00020367,
 author = {Takahashi, Toru and 髙橋, 透},
 month = {Mar},
 school = {名古屋大学, Nagoya University},
 title = {Vertical coupling in the polar mesosphere and lower thermosphere : Event studies of a gravity wave and a sporadic sodium layer},
 year = {2015}
}