MUSTO, J. C.; RESNICK, A. C.; FRICKE, M. C. Design and Validation of a Device to Aid in Extension Ladder Setup. Journal of Mechanical Engineering and Technology (JMET), [S. l.], v. 7, n. 2, 2015. Disponível em: https://jmet.utem.edu.my/jmet/article/view/366. Acesso em: 30 jan. 2026.