Baroni, H. J. (2006). Iron eyes: The life and teachings of the Ōbaku Zen master Tetsugen Dōkō. State University of New York Press.

Baroni, Helen Josephine. Iron Eyes: The Life and Teachings of the Ōbaku Zen Master Tetsugen Dōkō. Albany: State University of New York Press, 2006.

Baroni, Helen Josephine. Iron Eyes: The Life and Teachings of the Ōbaku Zen Master Tetsugen Dōkō. State University of New York Press, 2006.