H. M. AKRAM. Selection of Precise Vacuum Pumps for the Systems with Diverse Vacuum Ranges. Global Journals of Research in Engineering, [S. l.], v. 14, n. A2, p. 1–7, 2014. Disponível em: https://engineeringresearch.org/index.php/GJRE/article/view/986. Acesso em: 5 may. 2024.