For citations:

Kuchmaeva O.V., Kalmykova N.M., Kolotusha A.V. Mortality Rate Differentiation in Russia in 2019-2020: COVID-19 Pandemic and Other Factors. Scientific Research of Faculty of Economics. Electronic Journal. 2021;13(4):34-63. (In Russ.) https://doi.org/10.38050/2078-3809-2021-13-4-34-64