Mejía Mesa, G.I. (2000) “In-Vitro Sensitivity of Isolates of Streptococcus pneumoniae and Haemophilus influenzae to antibiotics in Medellin, Colombia”, Medicina UPB, 19(2), pp. 129–141. Available at: https://revistas.upb.edu.co/index.php/medicina/article/view/3500 (Accessed: 4 August 2026).