1. Historische Diatomeenproben als Information zur Herleitung von Referenzzuständen der Wasserqualität von Seen;Bavarian Agency of Water Management,2004
2. Seasonal changes in the attached algae of freshwater and saline lakes in the Lower Grand Coulee, Washington;Castenholz;Limnol. Oceanogr.,1960
3. Influence of submerged macrophytes on trophic interactions among fish and macroinvertebrates;Diehl,1998
4. Directive 2000/60/EC of the European Parliament and of the Council of 23 October 2000 establishing a framework for communities in the field of water policy;European Union;Official Journal of the European Communities,2000
5. Aufwuchs-Diatomeen in Seen und ihre Eignung als Indikatoren der Trophie;Hofmann;Bibliotheca Diatomologica,1994