K. V. Melentyeva, S. V. Kalinichenko, . I. I. Toryanyk, L. O. Popova, T. I. Antusheva, and N. . Popova, “State of measles incidence in Kharkiv region in the period 2017 - 2019”, AMI, no. 2, pp. 49–53, Jun. 2021.