A Stacked ARIMA-GRU meta-model for mortality modelling: An Ensemble Learning Approach. International Journal of Development Mathematics (IJDM), [S. l.], v. 3, n. 1, p. 156–171, 2026. DOI: 10.62054/ijdm/0301.13. Disponível em: https://ijdm.org.ng/index.php/Journals/article/view/291.. Acesso em: 28 mar. 2026.