WERDANI, Y. D. W. The effectiveness of laughter yoga to improve sleep quality in cancer patients during COVID-19 pandemic. Public Health and Preventive Medicine Archive, [S. l.], v. 10, n. 2, p. 180–188, 2022. DOI: 10.53638/phpma.2022.v10.i2.p09. Disponível em: http://phpmarchive.org/index.php/phpma/article/view/330. Acesso em: 26 apr. 2026.