HASAN ALI, Alaa; SALIH AHMED, Forat; ABDULKAREEM MOHAMMED, Kamal. A Computer Aided Design for Internal Spur and Helical Gears. Journal of Engineering and Sustainable Development, Baghdad, Iraq, v. 13, n. 1, p. 166–178, 2009. Disponível em: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1566.. Acesso em: 19 apr. 2025.