HELAL ZGAYER, Ajaj. Heat Transfer Enhancement Using Helical Pipes. Anbar Journal of Engineering Science, [S. l.], v. 5, n. 1, p. 126–139, 2012. DOI: 10.37649/aengs.2012.41143. Disponível em: https://ajes.uoanbar.edu.iq/ajes/article/view/430. Acesso em: 7 jun. 2025.