*Smith, A. R., Pryer, K. M., Schuettpelz, E., Korall, P., Schneider, H. & Wolf, P. G. 2006. A classification for extant ferns. Taxon 55: 705-731. | *Smith, A. R., Pryer, K. M., Schuettpelz, E., Korall, P., Schneider, H. & Wolf, P. G. 2006. A classification for extant ferns. Taxon 55: 705-731. |