KLEIN, Petra. RAL - quality mark for textiles used by employees in the production of foodstuffs. Tekstil, "Zagreb, Croatia", v. 50, n. 3, p. 138–142, 2001. Disponível em: https://www.tekstil.hist.hr/index.php/tekstil/article/view/2398. Acesso em: 22 apr. 2026.