SIKORA, R.; SASIMOWSKI, E.; SIKORA, J. W. Dihelicoidal extrusion. Principles and processing. Polimery, [S. l.], v. 56, n. 7-8, p. 591–596, 2011. Disponível em: https://ichp.vot.pl/index.php/p/article/view/950. Acesso em: 16 may. 2025.