Citations: Kuwabara1996

 

2) https://www.amazon.co.jp/%E3%82%B7%E3%82%AB%E3%82%B4%E5%AD%A6%E6%B4%BE%E7%A4%BE%E4%BC%9A%E5%AD%A6%E3%81%AE%E5%8F%AF%E8%83%BD%E6%80%A7-%E5%AE%9D%E6%9C%88-%E8%AA%A0/dp/4798916552

1) https://archive.ph/Nys3nhttps://archive.ph/https://sites.google.com/site/20120430prfphd/ndl-waybackmachine-archive-is/bot/citations-kuwabara-1996