Ktari, S., N. E. H. Ben Ayed, S. Maalej, B. Mnif, F. Rhimi, and A. Hammami. “Clinical Optochin Resistant Streptococcus Pneumoniae and Streptococcus Pseudopneumoniae Strains in Tunisia”. The Journal of Infection in Developing Countries, Vol. 15, no. 05, May 2021, pp. 672-7, doi:10.3855/jidc.13106.