MUHAMMAD, ZULKIFLI; WAN MOHD, Wardi. Improvement Of Stair Climbing Trolley. Progress in Engineering Application and Technology, [S. l.], v. 4, n. 1, p. 714–722, 2023. Disponível em: https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/10345.. Acesso em: 19 jun. 2024.