Nik Abdul Majid, Nik Hafiz, et al. “Condition Assessment and Non-Destructive Testing on Concrete Structure at Pasar Awam Pagoh”. Progress in Engineering Application and Technology, vol. 3, no. 2, Dec. 2022, pp. 148-55, https://publisher.uthm.edu.my/periodicals/index.php/peat/article/view/6176.