Type	Article
Authors(s)	Sigel, EM, Windham MD, Haufler CH, Pryer KM.
Year	2014
Title	Phylogeny, divergence time estimates, and phylogeography of the diploid species of the Polypodium vulgare complex (Polypodiaceae).
Periodical	Systematic Botany
Volume	39
Page(s)	1042–1055