Sukarno, Nota Ali, et al. “Effect of Shoot Peening Air Pressure Variations on Hardness and Microstructure of ST-37 Material: Pengaruh Variasi Tekanan Udara Shoot Peening Terhadap Kekerasan Dan Struktur Mikro Pada Material ST-37”. Prosiding University Research Colloquium, vol. 18, Feb. 2024, pp. 17-23, https://repository.urecol.org/index.php/proceeding/article/view/2949.