http://www.ntj.com.mt

http://perso.infonie.fr/butcus/index.html

http://www.daito-ryu.org/

http://www.hpl.hp.com/personal/Danny_Abramovitch/aiki.html

http://jujitsu.stanford.edu/genealogy.html

http://webrum.uni-mannheim.de/ggeo/aikido/vitae.html

http://www.nol.net/~jeffh/aikiclub/docs/chrono.txt

http://www.geocities.com/HotSprings/6065/ryugi.html