Berdinazarov К., Normurodov Н., Khakberdiev Э., Sadykov Ш., Ashurov Н., and Riskulov А. “STRESS–STRAIN CHARACTERISTICS OF ISOTACTIC POLYPROPYLENE J-170T AND BLOCK - COPOLYMER PROPYLENE WITH JM-370 ETHYLENE, DEPENDING ON TEMPERATURE AND EXTRUSION NUMBER”. SCIENCE AND INNOVATIVE DEVELOPMENT, vol. 3, no. 4, Sept. 2020, pp. 176-84, https://ilm-fan-journal.csti.uz/index.php/journal/article/view/212.