A Study on Effect of Laughter on Pulmonary Functions among Elderly People . Academia Journal of Medicine, [S. l.], v. 4, n. 1, p. 60–63, 2021. DOI: 10.48165/t2hxd234. Disponível em: https://www.journals.acspublisher.com/index.php/ajm/article/view/18926. Acesso em: 5 aug. 2025.