↑ Kenrick, Paul; Crane, Peter R. (1997). The Origin and Early Diversification of Land Plants: A Cladistic Study. Washington, D. C.: Smithsonian Institution Press. pp. 339–340. ISBN1-56098-730-8.
↑ Cronquist, A. (1966). "On the higher taxa of Embryobionta". Taxon. International Association for Plant Taxonomy (IAPT). 15 (15): 129–134. doi:10.2307/1217531. JSTOR1217531. Unknown parameter |coauthors= ignored (|author= suggested) (help)
↑ Cantino, Philip D. (2007). "Towards a phylogenetic nomenclature of Tracheophyta". Taxon. 56 (3): E1–E44. Unknown parameter |coauthors= ignored (|author= suggested) (help)
