s s k singh, s abdullah, a h azman, n n m nasir, m r m yazid, h hishamuddin, w a w ghopa, a k ariffin, d a wahab, a h shahrir, a azhar and m s solah.  (2020).  responsibility of the bus operator in terms of safety and health: a malaysian case study.  - iop conference series: materials science and engineering.  1-8. 

a h azman, s abdullah, s s k singh, m r m yazid, w a w ghopa, h hisamuddin, a h shahrir, a k ariffin, d a wahab, a azhar and m s solah.  (2020).  assessing the safety of express bus from passengers' perspective.  - iop conference series: materials science and engineering.  1-8.