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π-Economy. — Санкт-Петербург: СПбПУ, 2022 -.
Т. 15, № 1, 2022. — 1 файл (3,25 Мб). — Свободный доступ из сети Интернет (чтение, печать, копирование). — <URL:http://elib.spbstu.ru/dl/2/j22-187.pdf>.
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