FEI NGING, Chang; NIK HISYAMUDIN MUHD NOR. Design of Ladder Climbing Assisting Device with Simple Mechanism and Safety Equipment. Research Progress in Mechanical and Manufacturing Engineering, [S. l.], v. 3, n. 1, p. 587–598, 2022. Disponível em: https://publisher.uthm.edu.my/periodicals/index.php/rpmme/article/view/4655.. Acesso em: 3 may. 2024.