Kielbik, K. et al. 2023. Penicillin-binding protein genotyping of penicillin-nonsusceptible Streptococcus pneumoniae isolates from the nasopharynx of healthy preschool children. Current Issues in Pharmacy and Medical Sciences. 36, 2 (Jun. 2023), 94–98. DOI:https://doi.org/10.2478/cipms-2023-0016.