LAWANSON, A. O.; NOVIGNON, J. 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. 4, n. 3, 2016. Disponível em: https://ajouronline.com/index.php/AJHSS/article/view/3829. Acesso em: 19 apr. 2024.