Gubaydullin Rinat Shavkatovich (2026) “STUDY OF THE PHYSICAL AND MECHANICAL PROPERTIES OF RIGID POLYURETHANE FOAMS OBTAINED ON THE BASIS OF SYNTHESIZED PRODUCTS”, International Multidisciplinary Journal for Research & Development, 13(4), pp. 66–70. Available at: https://www.ijmrd.in/index.php/imjrd/article/view/5497 (Accessed: 4 April 2026).