J. L. Arredondo-García, E. Calderón, G. Echániz-Aviles, A. Soto-Noguerón, P. Arzate, and C. F. Amabile-Cuevas, “Serotypes and antibiotic susceptibility of Streptococcus pneumoniae isolates causative of invasive diseases in Mexican children”, J Infect Dev Ctries, vol. 5, no. 02, pp. 119–122, Oct. 2010.