Kalvatchev, N., et al. , translators. “APPLICATIONS OF COMMERCIAL PHAGE PREPARATIONS (BACTERIOPHAGES) AGAINST ANTIBIOTIC RESISTANT BACTERIAL ISOLATES IN BULGARIA”. General Medicine, vol. 28, no. 4, Aug. 2026, pp. 3-9, https://journals.mu-sofia.bg/index.php/gm/article/view/1053.