On Tsukasa Kuwabara

　Homepage(Japanese): http://warp.da.ndl.go.jp/info:ndljp/pid/11044971/ecowww.leh.kagoshima-u.ac.jp/staff/kuwabara/ (←　https://archive.is/DZSqy)

Homepage(English): https://megalodon.jp/2018-0628-0958-47/www2.sal.tohoku.ac.jp/soc/english/cgi-bin/wiki.cgi?page=KUWABARA+Tsukasa

Papers in English: https://web.archive.org/web/20180302024956/http://www.geocities.jp/ptk20120118/20170801-31/20170901-30/20171001-31/20171101-7/20171108-13/20171114/201711141642/Lecturenotes/kuwabara20180302.htm