Ghafforov Husayn Aliyarovich, and Jurayev Ilhom Ruzibayevich. “REPRESENTATION OF THE NUMBER IN THE NUMBER SYSTEM OF 10 AS SUM OF THE LEVELS OF 3”. Лучшие интеллектуальные исследования, vol. 18, no. 4, Apr. 2024, pp. 52-53, https://web-journal.ru/journal/article/view/4409.