^Lin, Xiaoyan; Hezari, Mehri; Koepp, Alfred E.; Floss, Heinz G.; Croteau, Rodney. Mechanism of Taxadiene Synthase, a Diterpene Cyclase That Catalyzes the First Step of Taxol Biosynthesis in Pacific Yew†. Biochemistry. 1996, 35 (9): 2968–77. PMID 8608134. doi:10.1021/bi9526239.