Calligraphy and meditation for stress reduction: an experimental comparison
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3928403/

Shufa: Chinese calligraphic handwriting (CCH) for health and behavioural therapy
http://resources.iupsys.net/iupsys/index.php/iupsysresources/297/13458-shufa-chinese-calligraphic-handwriting-cch-for-health-and-behavioural-therapy