Sasimowski, E. “Studies in the Effectiveness of a New Generation Extruder. Part III. Co-Operation of the Rotational Sleeve With the Grooved Zone of Barrel”. Polimery, vol. 57, no. 10, Oct. 2012, pp. 747-54, https://polimery.ichp.vot.pl/index.php/p/article/view/872.