Pérez de Gallo, M.A., Trujillo, H. and Mejía de Rodríguez, G.I. (1986) “Clinical study of acute tonsillopharyngitis”, Medicina UPB, 5(2), pp. 87–96. Available at: https://revistas.upb.edu.co/index.php/medicina/article/view/6014 (Accessed: 13 June 2026).