Ashurova Maftuna Ali qizi,. “???? ???? (????) ???? ???? ???? ???? OPERATORNING MUHIM SPEKTRI VA SPEKTRAL XOSSALARI”. Ustozlar uchun 18, no. 2 (May 31, 2023): 235–238. Accessed September 19, 2024. http://pedagoglar.uz/index.php/01/article/view/4796.