“Study Tensile Strength and Wear Rate for Unsaturated Polyester Resin and Nitrile Butadiene Rubber Polymer Blend”. Al-Khwarizmi Engineering Journal 11, no. 2 (March 31, 2015): 45–50. Accessed April 30, 2025. https://www.alkej.uobaghdad.edu.iq/index.php/alkej/article/view/223.