https://ja.wikipedia.org/wiki/2009%E5%B9%B4%E3%82%A6%E3%82%A4%E3%82%B0%E3%83%AB%E9%A8%92%E4%B9%B1#%E4%BA%8B%E4%BB%B6%E3%81%AE%E7%99%BA%E7%AB%AF
https://ja.wikipedia.org/wiki/2009%E5%B9%B4%E3%82%A6%E3%82%A4%E3%82%B0%E3%83%AB%E9%A8%92%E4%B9%B1#%E4%BA%8B%E4%BB%B6%E3%81%AE%E7%99%BA%E7%AB%AF
