Solana Yuko Halada. "Shodo History". Japanese Calligraphy in Zen Spirit. Archived from the original on 2011-01-02.
worldcat.org
Nakata, Yujiro (1973). The art of Japanese calligraphy. Weatherhill. OCLC255806098.
Boudonnat, Louise Kushizaki, Harumi (2003). Traces of the brush : the art of Japanese calligraphy. Chronicle. ISBN2020593424. OCLC249566117.{{cite book}}: CS1 maint: multiple names: authors list (link)
zenshodo.com
Solana Yuko Halada. "Shodo History". Japanese Calligraphy in Zen Spirit. Archived from the original on 2011-01-02.