SHELL, L. R.; COLLINS, J.R. A Field-Transferable Instrumentation Package for Comparing Tractor Performance. Journal of Agricultural Systems, Technology, and Management, [S. l.], v. 1, n. 2, p. 24–29, 1986. Disponível em: https://jastm.org/index.php/jastm/article/view/11857. Acesso em: 23 feb. 2025.