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Smith et al., 2006Lưu trữ 2008-02-26 tại Wayback Machine Alan R. Smith, Kathleen M. Pryer, Eric Schuettpelz, Petra Korall, Harald Schneider & Paul G. Wolf: "A classification for extant ferns," Taxon, 55(3): 705–731 (Aug 2006)
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Smith et al., 2006Lưu trữ 2008-02-26 tại Wayback Machine Alan R. Smith, Kathleen M. Pryer, Eric Schuettpelz, Petra Korall, Harald Schneider & Paul G. Wolf: "A classification for extant ferns," Taxon, 55(3): 705–731 (Aug 2006)