Ihsan T, Arbi Y, Irawan A, Sari IP. Fatigue analysis to driver of intercity in West Sumatra Province, Indonesia a case study of Padang – Bukittinggi – Payakumbuh route. JPTK [Internet]. 2020 Nov. 30 [cited 2026 Feb. 27];3(4):227-30. Available from: http://jptk.ppj.unp.ac.id/index.php/jptk/article/view/160