Ahmed, S.N. et al. 2019. Taxonomical and Phytochemical Characterization of Two Highly Traded Medicinal Species of Genus Berberis: Taxonomical and Phytochemical Characterization of two Medicinal Species of Genus Berberis. Proceedings of the Pakistan Academy of Sciences: B. Life and Environmental Sciences. 56, 3 (Sep. 2019), 121–125.