ALWAN AHMED, Ridha. MATHEMATICAL ANALYSIS OF SQUARE HOLE DRILLING MECHANISM. Journal of Engineering and Sustainable Development, Baghdad, Iraq, v. 22, n. 1, p. 109–120, 2018. Disponível em: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/327.. Acesso em: 6 feb. 2025.