IKKINCHI DАRАJАLI POLIETILENTEREFTАLАTNING FIZIKO-MEXАNIK XUSUSIYАTLАRINI KIMYOVIY VА JISMONIY MODIFIKАTSIYА ORQАLI SOZLАSH. IEC. Published online June 7, 2025:371-376. Accessed October 8, 2025. https://econfseries.com/index.php/2/article/view/2012