呼吸力探求-In Search of Kokyu Ryoku (In Japanese)
Originally published in 合気道探求 第２５号 - Aikido Tankyu Journal No.25 in 2007. The Aikido Tankyu Journal is published quarterly by the Aikikai Foundation.
Strategic Combat: The Other Half of Aikido
This article was originally published in the Aikido Journal Vol. 24, No. 2 (Issue 111) 1997. The Aikido Journal has moved from print media to an on-line only format and can be found at http://members.aikidojournal.com/
Kisshomaru Ueshiba, 2nd Aikido Doshu