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Айрапетян М.С. Кризис - 2020 в контексте циклической модели мировой и локальной истории // Проблемы теории и практики управления. – 2020. – №10 — <URL:http://elib.fa.ru/art2020/bv2215.pdf>.
| Period | Read | Copy | Open | Total | |
|---|---|---|---|---|---|
| Year 2021 | 0 | 0 | 1 | 0 | 1 |
| Year 2022 | 1 | 0 | 0 | 0 | 1 |
| Total | 1 | 0 | 1 | 0 | 2 |