Pryer, K. M., Schuettpelz, E., Wolf, P. G., Schneider, H., Smith, A. R. & Cranfill, R. (2004), "Phylogeny and evolution of ferns (monilophytes) with a focus on the early leptosporangiate divergences", American Journal of Botany, 91 (10): 1582–1598, doi:10.3732/ajb.91.10.1582, PMID21652310{{citation}}: CS1 maint: multiple names: authors list (link)
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pubmed.ncbi.nlm.nih.gov
Pryer, K. M., Schuettpelz, E., Wolf, P. G., Schneider, H., Smith, A. R. & Cranfill, R. (2004), "Phylogeny and evolution of ferns (monilophytes) with a focus on the early leptosporangiate divergences", American Journal of Botany, 91 (10): 1582–1598, doi:10.3732/ajb.91.10.1582, PMID21652310{{citation}}: CS1 maint: multiple names: authors list (link)