Ibrohimov , Javohir, and Dilshoda Ergashova. “CHEGIRMALAR SINFLARI. EYLER VA FERMA TEOREMALARI”. Scientific Journals "D-PRESS SERVICES", vol. 3, no. 5, Nov. 2025, pp. 10-14, https://d-pressa.com/index.php/dps/article/view/657.