D. S. . Awang Ismail and A. Kassim, “Monitoring of Deformation Behaviour of Unsaturated Soil Slope using Distributed Optical Fibre Sensor”, IJIE, vol. 12, no. 9, pp. 199–207, Dec. 2020, Accessed: Aug. 07, 2026. [Online]. Available: https://journal.uthm.edu.my/index.php/ijie/article/view/7373