BARTELS, Volkmar T.; UMBACH, Karl-Heinz. A new apparatus for testing the stiffness of textiles for making clothes. Tekstil, "Zagreb, Croatia", v. 55, n. 10, p. 527–528, 2006. Disponível em: https://www.tekstil2.hist.hr/index.php/tekstil/article/view/3300. Acesso em: 18 aug. 2026.