NOVIGNON, J.; LAWANSON, A. O. Efficiency of Health Systems in Sub-Sahara Africa: A Comparative Analysis of Time Varying Stochastic Frontier Models. Asian Journal of Humanities and Social Studies, [S. l.], v. 2, n. 5, 2014. Disponível em: https://ajouronline.com/index.php/AJHSS/article/view/1822. Acesso em: 24 apr. 2024.