EJIGU, B. A. Multilevel random effect and marginal models for longitudinal data. Ethiopian Journal of Science and Technology, [S. l.], v. 8, n. 2, p. 93–106, 2025. Disponível em: https://journals.bdu.edu.et/index.php/EJST/article/view/2026. Acesso em: 4 feb. 2026.