Tursunboy Abdullo o’g’li Qobilov. “IKKINCHI TARTIBLI CHIZIQLI XUSUSIY HOSILALI DIFFERENSIAL TENGLAMALARNI TIPINI ANIQLASH”. Diversity Research: Journal of Analysis and Trends 1, no. 3 (June 12, 2023): 277–283. Accessed January 10, 2025. https://academiaone.org/index.php/2/article/view/141.