mougd hadi alhatemy and mohammed hamed mahboba, “Improvement of Retread Blends Composed of Natural Rubber(Nr) And Polybutadiene Rubber(Br)”, NUCEJ, vol. 11, no. 3, pp. 478–484, Mar. 2008, Accessed: Dec. 23, 2024. [Online]. Available: https://oldjournal.eng.nahrainuniv.edu.iq/index.php/main/article/view/545