Angelova SG, Georgieva IL, Teodosieva AA, Korsun NS. Neuraminidase Inhibitor Susceptibility of Influenza Viruses Circulating in Bulgaria during the Last Four Consecutive Epidemic Seasons (2011/12 to 2014/15). ASRJETS-Journal. 2015;12(1):162-169. Accessed September 15, 2025. https://www.asrjetsjournal.org/American_Scientific_Journal/article/view/748