Boyanova, L. et al. 2025. Toxigenic Clostridioides difficile and Their Antibiotic Susceptibility in Bulgarian Patients during and Post-COVID-19 Pandemic. Proceedings of the Bulgarian Academy of Sciences. 78, 11 (Dec. 2025), 1703–1709. DOI:https://doi.org/10.7546/CRABS.2025.11.14.