“CHEGARADA BUZILADIGAN YUQORI TARTIBLI DIFFERENSIAL TENGLAMALAR UCHUN CHEGARAVIY MASALA”. Ustozlar uchun 86, no. 6 (December 29, 2025): 111–117. Accessed January 14, 2026. https://journalss.org/index.php/ust/article/view/13503.