ANNAMALAI, V. E.; GOKULARATHNAM, C. V.; KRISHNAMURTHY, R.; RAMU, B. A. Ultrasonic Machining as an Aid to Ceramic Etching. Defence Science Journal, [S. l.], v. 42, n. 1, p. 63–64, 2013. DOI: 10.14429/dsj.42.4352. Disponível em: https://publications.drdo.gov.in/ojs/index.php/dsj/article/view/4352. Acesso em: 6 jul. 2025.