Salim, Ashadi. “Pengukuran Panjang Simulasi Retak Permukaan Dengan Teknik Perambatan Gelombang Ultrasonik Permukaan”. ComTech: Computer, Mathematics and Engineering Applications 2, no. 1 (June 1, 2011): 133-138. Accessed March 9, 2025. https://journal.binus.ac.id/index.php/comtech/article/view/2725.