UNIVERSITARIO DE OPINIÓN PÚBLICA, Instituto. The political preferences in October 2003: the strong hand of ARENA. ECA: Estudios Centroamericanos, [S. l.], v. 58, n. 660, p. 1071–1078, 2003. DOI: 10.51378/eca.v58i660.5443. Disponível em: https://revistas.uca.edu.sv/eca/article/view/5443. Acesso em: 15 nov. 2026.