Theesudapan, W. ., J. . Chaiard, and R. . Chintanawat. “Impact of Insomnia Management Programme on Insomnia Severity in Older Persons With Heart Failure”. The Journal of Thailand Nursing and Midwifery Council, vol. 37, no. 03, Aug. 2022, pp. 5-19, https://he02.tci-thaijo.org/index.php/TJONC/article/view/256934.