R. ZAGHAR, Dhafer. Creation a New Mathematics Relations Using Engineering Approaches. Journal of Engineering and Sustainable Development, Baghdad, Iraq, v. 13, n. 4, p. 69–74, 2009. Disponível em: https://jeasd.uomustansiriyah.edu.iq/index.php/jeasd/article/view/1517.. Acesso em: 10 jul. 2025.