UMURZAKOV, Rustam. “BOLA OBRAZI NAZARIY MUAMMO SIFATIDA”. «O‘zMU XABARLARI» 1, no. 1.6.1 (July 11, 2025): 283–285. Accessed November 7, 2026. http://journals.nuu.uz/index.php/actanuuz/article/view/8304.