KESMANING IKKI CHETIDA BUZILADIGAN IKKINCHI TARTIBLI DIFFERENSIAL TENGLAMALAR UCHUN CHEGARAVIY MASALALAR. journal [Internet]. 2025 Dec. 23 [cited 2026 Jan. 14];86(3):352-60. Available from: https://journalss.org/index.php/ust/article/view/12387