M. H. Cang, P. T. B. Nhi, and N. T. C. Linh, “Betel (Piper betle L.) leaf essential oil extraction using steam distillation”, ijaers, vol. 7, no. 6, Jun. 2020, Accessed: Jul. 22, 2024. [Online]. Available: https://journal-repository.com/index.php/ijaers/article/view/2093