Pravdina N.F., Podcherniaeva R.Ya., Skovorodka V.V., Galegov G.A., Zhdanov V.M. (1987) Comparative study of the RNA-polymerase activity of non-pathogenic and pathogenic influenza viruses A and B. Voprosy Meditsinskoi Khimii, 33(4), 86-89.
Pravdina N.F. et al. Comparative study of the RNA-polymerase activity of non-pathogenic and pathogenic influenza viruses A and B // Voprosy Meditsinskoi Khimii. - 1987. - V. 33. -N 4. - P. 86-89.
Pravdina N.F. et al., "Comparative study of the RNA-polymerase activity of non-pathogenic and pathogenic influenza viruses A and B." Voprosy Meditsinskoi Khimii 33.4 (1987): 86-89.
Pravdina, N. F., Podcherniaeva, R. Ya., Skovorodka, V. V., Galegov, G. A., Zhdanov, V. M. (1987). Comparative study of the RNA-polymerase activity of non-pathogenic and pathogenic influenza viruses A and B. Voprosy Meditsinskoi Khimii, 33(4), 86-89.