Troia, A., Raimondo, F.M. and Campisi, P. 2014.

The Isoetes longissima complex (Isoetaceae) in Italy: observations on the morphology of spores and leaves, and taxonomic implications

. Phytotaxa. 174, 3 (Jul. 2014), 149–156. DOI:https://doi.org/10.11646/phytotaxa.174.3.3.