https://drive.google.com/file/d/1OGXh_t9duZpyMOXc7uOoALUpejBEkn0d/view?usp=sharing
https://nlab.itmedia.co.jp/nl/articles/2002/05/news136.html
https://drive.google.com/file/d/1WdUqV0gtle6gsTY14bH_W5kWDS_91zPH/view?usp=sharing
https://www.u-tokyo.ac.jp/content/400130020.pdf
https://www.u-tokyo.ac.jp/content/400130021.pdf