Novais, M.H., Jüttner, I., Vijver, B.V.D., Morais, M.M., Hoffmann, L. and Ector, L. 2015.

Morphological variability within the Achnanthidium minutissimum species complex (Bacillariophyta): comparison between the type material of Achnanthes minutissima and related taxa, and new freshwater Achnanthidium species from Portugal

. Phytotaxa. 224, 2 (Aug. 2015), 101–139. DOI:https://doi.org/10.11646/phytotaxa.224.2.1.