Buczkó, K., A. Z. Wojtal, and E. K. Magyari. “Lectotypification, Emended Description and Distribution of Planothidium distinctum (Achnanthidiaceae, Bacillariophyceae)”. Phytotaxa, vol. 117, no. 1, July 2013, pp. 1–10, doi:10.11646/phytotaxa.117.1.1.