UPAPHAI, W.; BUNYAWANICHAKUL, P.; JANTHONG, M. Trajectory tracking control design for an autonomous tractor using fuzzy PID controller. International Journal of Agricultural Technology, [S. l.], v. 13, n. 4, p. 501–519, 2017. Disponível em: https://li04.tci-thaijo.org/index.php/IJAT/article/view/6759. Acesso em: 16 aug. 2025.