M. Yusup, Eliza, Muhammad Adam Baduhalin, Abdul Syahmie Azri Abdul Rani, Jeffry Jamil, and Muhammad Nur Farhan Saniman. 2024. “Development of Efficient Frequency and Sensitivity of Transducer on Flaw Measurement by Using Ultrasonic Testing Method on Thin Carbon Steel Plate”. International Journal of Integrated Engineering 16 (9): 171-81. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/17403.