Wu, Hongsong. “Molecular Cloning and Characterization of a Flavonoid 3’-Hydroxylase Gene from Purple Coneflower (Echinacea Purpurea)”. INDIAN JOURNAL OF GENETICS AND PLANT BREEDING 83, no. 03 (September 25, 2023): 433–436. Accessed September 8, 2024. https://www.isgpb.org/journal/index.php/IJGPB/article/view/4337.