SAJJAD, Muhammad; WON JUNG, Dong. Design improvement and manufacturing of water down the hole hammer for bore drilling. International Journal of Engineering and Technology, [S. l.], v. 7, n. 4, p. 6568–6573, 2019. DOI: 10.14419/ijet.v7i4.29052. Disponível em: https://mail.sciencepubco.com/index.php/IJET/article/view/29052.. Acesso em: 20 may. 2025.