Djumabayev G’ulomjon Xalillayevich, and Shodiboyeva Zarnigor Xamro qizi. “ANIQ INTEGRALLARNI TAQRIBIY HISOBLASH”. Intent Research Scientific Journal, vol. 2, no. 6, July 2023, pp. 237-44, https://intentresearch.org/index.php/irsj/article/view/151.