- ↑ Campbell, Reece, "Phylum Coniferophyta."Biology. 7th. 2005. Print. P.595
- ↑ Catalogue of Life: 2007 Annual checklist - Conifer database 互聯網檔案館嘅歸檔,歸檔日期2009-01-15.
- ↑ Lott, J., Liu, J., Pennell, K., Lesage, A., & West, M. (2002, September). Iron-rich particles and globoids in embryos of seeds from phyla Coniferophyta, Cycadophyta, Gnetophyta, and Ginkgophyta: characteristics of early seed plants. Canadian Journal of Botany, 80(9), 954-961. Retrieved July 17, 2009, from Academic Search Premier database.