References
Best Karate
(series of 11 books), M. Nakayama (Kodansha International, Tokyo, 1979)
Dynamic Karate M. Nakayama (Kodansha International, Tokyo, 1974)
The Shotokan Karate Dictionary
(Shotokan no Hyakkajiten), Schlatt, (SAKE Translations International, Lauda, 1996)