Marques, M. O., & Oliveira, E. F. (2007): Sensei Seiichi AkamineArchived 2011-07-06 at the Wayback Machine. (ポルトガル語)Karatedo On-line (1 February 2007). Retrieved on 23 January 2011.
Prieto, F. (c. 2010): Master Akamine Retrieved on 23 January 2011.
web.archive.org
Marques, M. O., & Oliveira, E. F. (2007): Sensei Seiichi AkamineArchived 2011-07-06 at the Wayback Machine. (ポルトガル語)Karatedo On-line (1 February 2007). Retrieved on 23 January 2011.