Kien, Do Trung, Pham Thi Tuyet Nhung, and Pham Van Thanh. “Non-Destructive Characteristics of Ultrasonic Waves in 1018 Low Carbon Steel”. <i>Communications in Physics</i> 24, no. 3S1 (October 10, 2014): 1–6. Accessed December 31, 2025. https://vjs.ac.vn/cip/article/view/1.