Axmedov , Xolxo‘ja Raxmatullayevich. 2022. “YUQORI QOVUSHQOQLI OG‘IR NEFT VA TABIIY BITUM KONLARINI QAZIB CHIQARISH METODLARI”. INTERNATIONAL CONFERENCES 1 (10):8-12. https://researchedu.org/index.php/cf/article/view/759.