“Effect of Polyurethane (PUR) Core Density of Sandwich Elements With Two Metal Layers on Their Resistance to Tensile Stresses”. 2026. Latakia University (formerly Tishreen) Journal for Research and Scientific Studies - Engineering Sciences Series 48 (3): 263-75. https://journal.latakia-univ.edu.sy/index.php/engsc/article/view/21737.