@techreport{oai:jaxa.repo.nii.ac.jp:00043591,
 author = {佐藤, 浩 and 斉藤, 博之助 and 中村, 宏 and Sato, H. and Saito, H. and Nakamura, H.},
 month = {Jun},
 note = {When summer ends , tree leaves start falling. They dance around in air. We planned to perform a systematic investigation on the dance. We used a transparent water tank and dropped various kinds of thin model. Among them the best dance is performed by the one-yen coin. The dance by the coin is very regular and reprodecible. After hundreds of trial we found that the stable dance is performed by models with axial symmmetry. In the process of falling all models turn around the vertical axis and if there is no symmetricity, falling mode changes. Appropriate conditions for the stable dance were discovered., 資料番号: NALSP0059019, レポート番号: NAL SP-59},
 title = {落ち葉の舞},
 year = {2003}
}