Valijonova S. n-TARTIBLI CHIZIQLI O‘ZGARMAS KOEFFITSIYENTLI BIR JINSLI BO‘LMAGAN DIFFERENSIAL TENGLAMALARNI ANIQMAS KOEFFITSIYENTLAR USULIDA YECHISH. YD [Internet]. 2026 Apr. 29 [cited 2026 Jun. 1];2(8):6-9. Available from: https://konferensiyalar.com/index.php/yd/article/view/399