Król, P., and J. Wojturska. “Effects of Chemical and Supermolecular Structures on Mechanical Properties of polyurethane/Unsaturated Polyester Compositions of Interpenetrating Polymer Networks Types”. Polimery, vol. 49, no. 11-12, Sept. 2022, pp. 790-0, https://ichp.vot.pl/index.php/p/article/view/1814.