MOORE, A.; MOTAGHI, S.; SADEGHIRAD, B.; BEGUM, H.; RIVA, J. J.; GABER, J.; DOLOVICH, L. Volunteer Impact on Health-Related Outcomes for Seniors: a Systematic Review And Meta-Analysis. Canadian Geriatrics Journal, v. 24, n. 1, p. 44-72, 18 Feb. 2021.