Murphy, J. (2007) «The importance of stakeholder perception in understanding impact: The Basic Integrated Health System (sibasi) program and quality of primary healthcare in El Salvador», Gerencia y Políticas de Salud, 6(12). Disponible en: https://revistas.javeriana.edu.co/index.php/gerepolsal/article/view/2697 (Accedido: 4 mayo 2024).