Stasiek, J. “The Effects of Constructional Solutions of Plasticizing Screw Configurations and Extrusion Conditions on Polypropylene Composite Properties”. Polimery, vol. 50, no. 11-12, Sept. 2022, pp. 881-9, https://polimery.ichp.vot.pl/index.php/p/article/view/1701.