Feng, X., &; Dickinson, H. G. (2007). Packaging the male germline in plants. Trends in Genetics. Elsevier BV.https://doi.org/10.1016/j.tig.2007.08.005 

Liao, Z., Chen, M., Gong, Y., Guo, L., Tan, Q., Feng, X.,https://doi.org/10.1080/10425170410001667348__Tang, K. (2004). A new geranylgeranyl Diphosphate synthase gene from Ginkgo biloba, which intermediates the biosynthesis of the key precursor for ginkgolides. DNA Sequence. Informa UK Limited.https://doi.org/10.1080/10425170410001667348