1. ABNT. Associação Brasileira de Normas Técnicas. NBR 11114—Leather - Determination of the extent of resistance to continuous flexing. 2020a. https://www.normas.com.br/visualizar/abnt-nbr-nm/4498/abnt-nbr11114-couro-determinacao-da-medida-de-resistencia-a-flexoes-continuas. Accessed 23 Sep 2021.
2. ABNT. Associação Brasileira de Normas Técnicas. NBR ISO 3376 - Leather — Physical and mechanical tests — Determination of tensile strength and percentage elongation. 2020b. https://standards.iteh.ai/catalog/standards/iso/db8f52c3-c114-4813-b572-776eb95670e5/iso-3376-2020b. Accessed 25 Sep 2021.
3. ABNT. Associação Brasileira de Normas Técnicas. NBR ISO 2589 - Leather - Physical and mechanical tests - Determination of thickness. 2016a. https://www.iso.org/standard/68859.html. Accessed 23 Sep 2021.
4. ABNT. Associação Brasileira de Normas Técnicas. NBR ISO 3377–2 - Leather — Physical and mechanical tests — Determination of tear load Part 2: Tear double-edged. 2016b. https://standards.globalspec.com/std/9992787/iso-3377-2. Accessed 23 Sep 2021.
5. ABNT. Associação Brasileira de Normas Técnicas. NBR ISO 3377 - Leather — Physical and mechanical tests — Determination of tear load — Part 1: Single edge tear. 2002. https://www.iso.org/standard/24033.html. Accessed 14 Jul 2022.