BELOZERTSEV, V. et al. 2021. DEVELOPMENT OF INFORMATION SYSTEMS AND TECHNOLOGIES IN THE WORLD ECONOMY DURING COVID-19. Herald of Khmelnytskyi National University. Economic sciences. 296, 4 (Jun. 2021), 105–109. DOI:https://doi.org/10.31891/2307-5740-2021-296-4-17.