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N. S. Nagalingum, H. Schneider, y K. M. Pryer, "Comparative Morphology of Reproductive Structures in Heterosporous Water Ferns and a Reevaluation of the Sporocarp". International Journal of Plant Sciences, 167 (2006), 805–815 (resumen en inglés aquí y pdf aquí)
Pryer, Kathleen M., Eric Schuettpelz, Paul G. Wolf, Harald Schneider, Alan R. Smith y Raymond Cranfill. 2004. "Phylogeny and evolution of ferns (monilophytes) with a focus on the early leptosporangiate divergences". American Journal of Botany 91:1582-1598 (resumen en inglés aquíArchivado el 26 de agosto de 2010 en Wayback Machine.).
