Mejía Mesa, Gloria Isabel, et al. “In-Vitro Sensitivity of Isolates of Streptococcus Pneumoniae and Haemophilus Influenzae to Antibiotics in Medellin, Colombia”. Medicina UPB, vol. 19, no. 2, Dec. 2000, pp. 129-41, https://revistas.upb.edu.co/index.php/medicina/article/view/3500.