“STREPTOCOCCUS PNEUMONIAE IN ITALIA: CLONI CIRCOLANTI DI CEPPI NON VACCINALI ANTIBIOTICO-RESISTENTI”. Microbiologia Medica 22, no. 3 (September 30, 2007). Accessed June 10, 2026. https://www.pagepressjournals.org/mm/article/view/2744.