He, Y., P. Hou, G. Fan, D. Li, and C. Peng. “Isolation and Characterization of a Novel (S)-Canadine Synthase Gene from Coptis Chinensis”. Electronic Journal of Biotechnology, vol. 18, no. 5, Oct. 2015, https://www.ejbiotechnology.info/index.php/ejbiotechnology/article/view/2015.08.004.