Mochammad Tutuk Safirin, Mega Islami, Rizqi Sari, Sinta Dewi, Enny Aryanny. Mental Workload Analysis of Workers Using the Swedish Occupational Fatigue Index (SOFI) Method at A Job Shop, Sheet Metal, And Pipe Metal Manufacturing Company in Surabaya. Technium [Internet]. 2023 Oct. 29 [cited 2026 Apr. 17];16(1):411-6. Available from: https://techniumscience.com/index.php/technium/article/view/10020