1. Mirzaie M, Darabi S. Population aging in Iran and rising health care costs. Salmand: Iranian Journal of Ageing. 2017; 12(2): 156-69. [Persian]
2. Latifi Z, Kiani M, Yousefi Z. The structural equation modeling of the older people’s life expectancy based on the anxiety sensitivity, social support, and pain Perception. Salmand: Iranian Journal of Ageing. 2019; 14(2): 188-99. [Persian]
3. Tayeri S, Jafari M, Alimohammadzadeh K, Hosseini SM, Shahanaghi K. A conceptual model for Iranian older women’s health: A review study. Salmand: Iranian Journal of Ageing. 2021; 16(3): 304-29. [Persian]
4. Dindar Farkosh J, Kazemipour Sabet S, Ansari H. Foresight of the aging trend of the Iranian population in different regions and population groups until 1420. Journal of Future studies Management. 2022; 128(33): 103-22. [Persian]
5. Changizi F, Panahali A. Effectiveness of group narrative therapy on life expectancy and happiness of the elderly in Tabriz. Journal of Instruction and Evaluation. 2016; 9(34): 63-76. [Persian]
6. Parvaneh E, Azizi K, Karimi P. The effectiveness of hope-therapy on the enhancement of happiness in elderly. Aging Psychology. 2015; 1(1): 41-7. [Persian]
7. Zarepour Moghadami A, Norouzadeh R. The relationship between elderly happiness and self-efficacy in the elderly with chronic disease residing in a nursing home, Tabriz, 2020. Qom University of Medical Sciences Journal. 2022; 15(10): 674-83. [Persian]
8. Oraki M, Mehdizadeh A, Dortaj A. The effectiveness of self-care empowerment training on life expectancy, happiness and quality of life of the elderly in Iranian elderly care centers in Dubai. Salmand: Iranian Journal of Ageing. 2019; 14(3): 320-31. [Persian]
9. Entezari M, Zakizadeh M, Yazdani J, Taraghi Z. The effect of group singing on the happiness of older people. Journal of Nursing and Midwifery Sciences. 2019; 6(2): 78-83.
10. Mottaghi M, Hazratian S. Comparison of the effects of music and rose water aAromatherapy on the happiness level among the elderly living in nursing homes in Kermanshah in 2018. Avicenna Journal of Nursing and Midwifery Care. 2022; 30(4): 288-96. [Persian]
11. Allison TA, Nápoles AM, Johnson JK, Stewart AL, Rodriguez-Salazar M, Peringer J, et al. Multi-cultural perspectives on group singing among diverse older adults. Geriatric Nursing. 2020; 41(6): 1006-12.
12. Schäfer T. The positive effects of online group singing on psycho-physiological variables during the COVID-19 pandemic—A pilot randomized controlled trial. Applied Psychology: Health and Well-Being. 2023; 15(4): 1254-70.
13. Monroe P, Halaki M, Luscombe G, Kumfor F, Ballard KJ. Phase I trial of the music to connect (MuSiCON) protocol: feasibility and effect of choir participation for individuals with cognitive impairment. Brain Impairment. 2023; 24(3): 732-49.
14. Van Harling JH, Wibowo ME, Ganap V. Music as a means of therapy for elders. The Journal of Educational Development. 2017; 5(2): 136-44.
15. Gallego MG, García JG. Music therapy and Alzheimer's disease: Cognitive, psychological, and behavioural effects. Neurología. 2017; 32(5): 300-8.
16. Shukuroglou M, Roseman L, Wall M, Nutt D, Kaelen M, Carhart-Harris R. Changes in music-evoked emotion and ventral striatal functional connectivity after psilocybin therapy for depression. Journal of Psychopharmacology. 2023; 37(1): 70-9.
17. Mirzaee K, Jahanpour F, Gashmard R, Akaberian S. Comparison of the effect of music therapy and swaddling on pain intensity caused by blood sampling in premature infants admitted to the neonatal intensive care unit: a randomized trial. Iranian South Medical Journal. 2023; 25(5): 454-65.
18. Nguyen KT, Vu NT, Tran MT, Chan CW. A qualitative study on stress, coping strategies and feasibility of music intervention among women with cancer receiving chemotherapy during COVID-19 pandemic in Vietnam. Scientific Reports. 2023; 13(1): 542.-9
19. Kousha S, varasteh A. The effectiveness of music therapy on depression, quality of life and happiness of women with depression. Rooyesh. 2018; 6 (4): 149-69. [Persian]
20. Hills P, Argyle M. The oxford happiness questionnaire: a compact scale for the measurement of psychological well-being. Personality and Individual Differences. 2002; 33(7): 1073-82.
21. Alipour A, Noorbala A. A preliminary evaluation of the validity and reliability of the oxford happiness questionnaire in students in the universities of Tehran. Iranian Journal of Psychiatry & Clinical Psychology. 1999; 17: 55-65. [Persian]
22. Yousefi Z, Sharifi K, Tagharrobi Z, Akbari H. The effect of group reminiscence on happiness of the elderly. Evidence Based Care Journal. 2014; 4(3): 33-46. [Persian]
23. 23. Khodabakhshi-koolaee A, Zahmatkesh M, Barzeghar Khezri R. The effect of relaxation and instrumental music by Arnd Stein on quality of sleep and happiness among ageing women. Journal of Torbat Heydariyeh University of Medical Sciences. 2017; 5(4): 46-53.
24. Ramtin S, Nikpeyma N. Investigating the happiness promotion Strategies in Iranian older adults: a review article. Journal of Gerontology. 2020; 4(4):40-55. [Persian]
25. Mehrabizadeh Honarmand M, Salehi M, Kazemi N. The effectiveness of music therapy and relaxation on blood pressure and pulse in the elderly with hypertension. Aging Psychology. 2017; 2(4): 293-303. [Persian]
26. Safarzadeh S, Savari K, Dashtbozorgi Z. Comparison of distress tolerance, coping styles, spiritual intelligence and happiness among elderly men and women. Aging Psychology. 2017; 2(4): 237-48. [Persian]
27. Kim J, Song Y, Kim T, Park K. Predictors of happiness among older Korean women living alone. Geriatrics & Gerontology International. 2019; 19(4): 352-6.
28. Sakamoto R, Okumiya K, Norboo T, Tsering N, Wada T, Fujisawa M, et al. Health and happiness among community-dwelling older adults in Domkhar valley, Ladakh, India. Geriatrics & Gerontology International. 2017; 17(3): 480-6.
29. Sithey G, Thow AM, Li M. Gross national happiness and health: lessons from Bhutan. Bulletin of the World Health Organization. 2015; 93(8): 514.