H. M. AKRAM. Selection of Appropriate Control Valves for Vacuum Systems. Global Journals of Research in Engineering, [S. l.], v. 14, n. A4, p. 15–20, 2014. Disponível em: https://engineeringresearch.org/index.php/GJRE/article/view/1037. Acesso em: 30 apr. 2024.