Pach, J., and J. W. Kaczmar. “Influence of the Chemical Modification of Hemp Fibers on Selected Mechanical Properties of Polypropylene Composite Materials”. Polimery 56, no. 5 (May 30, 2011): 385-389. Accessed May 9, 2024. https://ichp.vot.pl/index.php/p/article/view/929.