Jamal Mohamad, Farah Aina, Ruzairi Abdul Rahim, Nasarudin Ahmad, Juliza Jamaludin, Sallehuddin Ibrahim, Mohd Hafiz Fazalul Rahiman, Nur Arina Hazwani Samsun Zaini, and Navintiran Rajan. “Concrete-Defect Detection Using New Ultrasonic Array”. ELEKTRIKA- Journal of Electrical Engineering 20, no. 2-3 (October 15, 2021): 87–92. Accessed May 5, 2024. https://elektrika.utm.my/index.php/ELEKTRIKA_Journal/article/view/316.