Zhongqiu, Hu, et al. “Microwave-Low-Pressure Process (MWLP): An Effective Technology Applied in Extraction of Total Polyphenols”. International Journal of Agricultural and Biological Engineering, vol. 6, no. 4, Dec. 2013, pp. 84-95, https://ijabe.migration.pkpps06.publicknowledgeproject.org/index.php/ijabe/article/view/903.