Nasser, Nazar E., Yasir A. J. Al-abdli, and Essam F. A. Al-Jumaily. 2011. “Extraction of Catechin from Green Tea Plants Camellia Sinensis”. Journal of Biotechnology Research Center 5 (3):9-14. https://doi.org/10.24126/jobrc.2011.5.3.173.