[1]https://www.rd.com/article/counting-sheep/
[2]Illustrations of Political Economy (3rd ed) in 9 vols. (London: Charles Fox, 1832).
[3]Alfonso, Pedro; Alfonsi, Petrus (January 1977). Eberhard Hermes (ed.). The Disciplina Clericalis of Petrus Alfonsi. Translated by Eberhard Hermes, P. R. Quarrie. ISBN 9780520027046.
[4]《堂吉诃德》,杨绛译,人民文学出版社
[5]https://en.wikipedia.org/wiki/Counting_sheep
[6]https://www.verywellhealth.com/does-counting-sheep-actually-put-a-person-to-sleep-2224296#:~:text=In%20most%20versions%20of%20the,the%20visualization%20helps%20people%20sleep. https://piyao.kepuchina.cn/h5/rumordetail?id=bEOx
[7]Harvey AG, Payne S. The management of unwanted pre-sleep thoughts in insomnia: distraction with imagery versus general distraction. Behaviour Research and Therapy. 2002;40(3):267-277
[8]https://www.cnn.com/2024/03/24/health/counting-sheep-for-sleep-explained-wellness/index.html
[9]Harvey, Allison G., and Suzanna Payne. 2002. “The management of unwanted pre-sleep thoughts in insomnia: distraction with imagery versus general distraction.” Behaviour Research and Therapy. 40 (3): 267-277.[10]https://www.abc.net.au/everyday/does-counting-sheep-help-you-get-to-sleep/11219660
[11]Vierra J, Boonla O, Prasertsri P. Effects of sleep deprivation and 4-7-8 breathing control on heart rate variability, blood pressure, blood glucose, and endothelial function in healthy young adults. Physiol Rep. 2022 Jul;10(13):e15389. doi: 10.14814/phy2.15389. PMID: 35822447; PMCID: PMC9277512.
[12]https://www.thenewdaily.com.au/life/2023/07/08/want-to-fall-asleep-in-two-minutes
[13]https://www.cnn.com/2022/09/16/health/4-7-8-breathing-technique-relaxing-wellness/index.html