1. Bhaktivedanta Swami Prabhupāda, A. C. (2008). The Bhagavad-Gita as it is: With the original Sanskrit text, Roman transliteration, English equivalents, translation and elaborate purports. The Bhaktivedanta Book Trust.
2. Buckley, T., Stannard, A., Bartrop, R., McKinley, S., Ward, C., Mihailidou, A. S., Morel-Kopp, M. C., Spinaze, M., & Tofler, G. (2012). Effect of early bereavement on heart rate and heart rate variability. The American Journal of Cardiology, 110(9), 1378–1383.
3. Guiding an Improved Dementia Experience (GUIDE) Model. (2023). Centers for Medicaid and Medicare. Available at https://www.cms.gov/priorities/innovation/innovation-models/guide#:~:text=Through%20the%20GUIDE%20Model%2C%20CMS,access%20to%20a%20support%20line
4. McCraty, R., Atkinson, M., Tiller, W. A., Rein, G., & Watkins, A. D. (1995). The effects of emotions on short-term power spectrum analysis of heart rate variability. The American Journal of Cardiology, 76, 1089–1093.