Xudayorov , Rashid, and Abdullajon Abdulhamidov. “VARIATSIYA KO‘RSATKICHLARINING MAZMUNI ULARNI HISOBLASH USULLARI: Https: doi.org 10.5281 Zenodo.14533800”. International Scientific and Practical Conference, vol. 1, no. 3, Dec. 2024, pp. 7-9, https://bestjournalup.com/index.php/ispc/article/view/788.