Hidayati, R. N., A. Surono, and V. Jaladara. “Safety and Health in Informal Sector: A Case Study Occupational Fatigue of Porters at Legi Market, Surakarta”. BKM Public Health and Community Medicine, Vol. 37, no. 02, Feb. 2021, pp. 59-73, doi:10.22146/bkm.v37i02.1689.