Van de Vijver, B., Wetzel, C., Kusber, W-H., Ector, L. (2020). Observations on and typification of Synedra crotonensis f. belgica Grunow and Fragilaria crotonensis var. prolongata Grunow (Fragilariaceae, Bacillariophyta) and the introduction of Fragilaria prolongata comb. et stat. nov.
Notulae algarum. 166: 1-6.