MANALU, Stella Mediana; SARINI ABDULLAH. A country-level k-Means Clustering of stress and coping strategies during the COVID-19 pandemic. Journal of Natural Sciences and Mathematics Research, [S. l.], v. 12, n. 1, p. 63–74, 2026. DOI: 10.21580/jnsmr.v12i1.31506. Disponível em: https://journal.walisongo.ac.id/index.php/JNSMR/article/view/31506. Acesso em: 24 aug. 2026.