Avezov, Alijon Xayrulloyevich, and Yulduz Rasulovna Kurbonova. 2023. “Bir Fridrixs Model Operatorining Muhim Spektrdan Tashqaridagi Xos Qiymatlari Soni Va Joylashgan o’rni”. Science and Education 4 (5):34-45. https://openscience.uz/index.php/sciedu/article/view/5689.