Buriachenko, S., & Stegniy, B. (2019). Polymorphism of gene Hemagglutinin and its influence on the properties of influenza virus a H1N1 and H7N9 strains. ScienceRise: Biological Science, (2 (17), 14–17. https://doi.org/10.15587/2519-8025.2019.168500