Taboonpong, S., N. Puthsri, W. Kong-In, and A. Saejew. “The Effects of Tai Chi on Sleep Quality, Well-Being and Physical Performances Among Older Adults”. Pacific Rim International Journal of Nursing Research, Vol. 12, no. 1, 1, pp. 1-13, https://he02.tci-thaijo.org/index.php/PRIJNR/article/view/5887.