Dilmurodov, E. “QUTB KORDINATALAR SISTEMASI VA UNING BA’ZI TATBIQLARI HAQIDA”. Ilmiy Nashrlar Markazi (buxdu.Uz), vol. 6, no. 6, Nov. 2021, http://journal.buxdu.uz/index.php/journals_buxdu/article/view/3388.