Gutmann, Rainer, and Snježana Boger. “Direct Measurement of Amorphous Orientation in Melt-Spun Polymer Fibers”. Tekstil 54, no. 6 (June 30, 2005): 279–283. Accessed April 23, 2026. https://www.tekstil.hist.hr/index.php/tekstil/article/view/3074.