AN EXTENDED OCTAGONAL RING DYNAMOMETER FOR MEASUREMENT OF FORCES ON A SIMPLE TILLAGE TOOL. Nigerian Journal of Technology, [S. l.], v. 21, n. 1, p. 46–59, 2003. DOI: 10.4314/njt.211.453. Disponível em: https://www.nijotech.com/index.php/nijotech/article/view/453. Acesso em: 13 jan. 2026.