Aquatic ferns from Viçosa (MG, Brazil): Salviniales (Filicopsida; Tracheophyta).

Miranda, C. V., Schwartsburd, P. B., (2016). Brazilian Journal of Botany 39(3), 935-942. Springer International Publishing AG, Cham, Switzerland. English language

Morphology and ultrastructure of heterosporous Filicophyta spores from north-west Argentina.

Gardenal, P., Morbelli, M. A., Giudice, G. E., (2007). Grana 46(2), 65-77. Taylor & Francis, Basingstoke, UK. English language

Water-clover ferns, Marsilea, in the southeastern United States.

Jacono, C. C., Johnson, D. M., (2006). Castanea 71(1), 1-14. Southern Appalachian Botanical Society, Newberry, USA. English language