LI, Keqi. Longitudinal Analysis of World Happiness Scores (2015–2019). Science and Technology of Engineering, Chemistry and Environmental Protection, [S. l.], v. 3, n. 6, p. 12812, 2025. DOI: 10.61173/qs3nv356. Disponível em: https://stecep.deanfrancis.press/article/view/420. Acesso em: 4 nov. 2026.