Reference

Siegfried Jost Casper, W. Scheffler, K. Augsten, Th. Peschke (1987): Some observations on the Stephanodiscus hantzschii-group (Bacillariophyta) in waters of the G.D.R. I. Stephanodiscus hantzschii and S."tenuis" in lakes Wentow, Tollense, Haussee, and Bautzen reservoir – Arch. Protistenkunde – 134: 17 - 34.