Chung-Shien Wu, Ya-Nan Wang, Shu-Mei Liu and Shu-Miaw Chaw (2007). «Chloroplast Genome (cpDNA) of Cycas taitungensis and 56 cp Protein-Coding Genes of Gnetum parvifolium: Insights into cpDNA Evolution and Phylogeny of Extant Seed Plants». Molecular Biology and Evolution. 24 (6): 1366–1379. PMID17383970. doi:10.1093/molbev/msm059 !CS1 manut: Nomes múltiplos: lista de autores (link)
Won, Hyosig; Renner, Susanne (agosto de 2006). «Dating Dispersal and Radiation in the Gymnosperm Gnetum (Gnetales)—Clock Calibration When Outgroup Relationships Are Uncertain». Systematic Biology. 55 (4): 610–622. PMID16969937. doi:10.1080/10635150600812619
Sarah Matthews: Phylogenetic relationships among seed plants: Persistent questions and the limits of molecular data. American Journal of Botany, Band 96, 2009, S. 228–236. doi:10.3732/ajb.0800178
Chung-Shien Wu, Ya-Nan Wang, Shu-Mei Liu and Shu-Miaw Chaw (2007). «Chloroplast Genome (cpDNA) of Cycas taitungensis and 56 cp Protein-Coding Genes of Gnetum parvifolium: Insights into cpDNA Evolution and Phylogeny of Extant Seed Plants». Molecular Biology and Evolution. 24 (6): 1366–1379. PMID17383970. doi:10.1093/molbev/msm059 !CS1 manut: Nomes múltiplos: lista de autores (link)
Won, Hyosig; Renner, Susanne (agosto de 2006). «Dating Dispersal and Radiation in the Gymnosperm Gnetum (Gnetales)—Clock Calibration When Outgroup Relationships Are Uncertain». Systematic Biology. 55 (4): 610–622. PMID16969937. doi:10.1080/10635150600812619
«Science Magazine». Runcaria, a Middle Devonian Seed Plant Precursor. American Association for the Advancement of Science. 2011. Consultado em 22 de março de 2011