https://ja.wikipedia.org/wiki/%E9%B6%8F%E5%8D%B5#%E4%BA%8C%E9%BB%84%E5%8D%B5%E5%A4%9A%E7%99%BA%E9%B6%8F%E7%A8%AE%E3%81%AE%E5%93%81%E7%A8%AE%E6%94%B9%E8%89%AF
https://ja.wikipedia.org/wiki/%E9%B6%8F%E5%8D%B5#%E4%BA%8C%E9%BB%84%E5%8D%B5%E5%A4%9A%E7%99%BA%E9%B6%8F%E7%A8%AE%E3%81%AE%E5%93%81%E7%A8%AE%E6%94%B9%E8%89%AF
