Friction coefficient of maize, cowpea and groundnuts on different structural surfaces. Journal of Science and Technology, [S. l.], v. 27, n. 1, 2016. DOI: 10.4314/just.v27i1.680. Disponível em: https://journal.knust.edu.gh/index.php/just/article/view/680. Acesso em: 11 jun. 2026.