Leszczyńska, Milena, Joanna Ryszkowska, and Leonard Szczepkowski. “Rigid Polyurethane Foam Composites With Nut Shells”. Polimery 65, no. 10 (December 16, 2020): 728–737. Accessed December 4, 2024. https://ichp.vot.pl/index.php/p/article/view/82.