SISWANTO; TRIANA, Nurul Widji. Vacuum Evaporator Design Liquid Ring Vacuum Pump Method. Nusantara Science and Technology Proceedings, Malang, Indonesia, p. 222–226, 2018. Disponível em: https://nstproceeding.com/index.php/nuscientech/article/view/38. Acesso em: 18 jun. 2025.