Andersona , K. F., F. D. Hanggara, and Adi Nugroho. “Ergonomic Trolley Design for Sigma Motor UMKM Material Handling Workers”. Greeners: Journal of Green Engineering for Sustainability, vol. 1, no. 01, Sept. 2023, pp. 31-41, https://journal.uvers.ac.id/index.php/greeners/article/view/170.