FRAJMOVICH, DENIS Y., et al. “ASSESSMENT OF CHANGES IN THE STABILITY OF ECONOMIC PROCESSES IN THE REGIONS OF THE RUSSIAN FEDERATION”. Gosudarstvennaya Sluzhba, vol. 22, no. 6, Nov. 2020, pp. 28-36, https://doi.org/10.22394/2070-8378-2020-22-6-28-36.