“Studying of Influence of Nitrile Rubber Adding on Some Physical, Mechanical and Thermal Properties of Unsaturated Polyester Resin ”. Latakia University Journal -Engineering Sciences Series, vol. 44, no. 3, Aug. 2022, pp. 155-68, https://journal.latakia-univ.edu.sy/index.php/engscnc/article/view/13201.