Buriachenko, Semen, and Borys Stegniy. “Polymorphism of Gene Hemagglutinin and Its Influence on the Properties of Influenza Virus a H1N1 and H7N9 Strains”. ScienceRise: Biological Science, no. 2 (17) (July 11, 2019): 14–17. Accessed November 24, 2024. https://journals.uran.ua/sr_bio/article/view/168500.