1. Andrushaitis, A., Seisuma, Z., 1995. River load eutrophying substances and heavy metals into the Gulf of Riga. In: Ojaveer, E. (Ed.), Ecosystem of the Gulf of Riga Between 1920–1990. Estonian Academy, Tallinn.
2. Einzugsgebiet der Ostsee;Aurada,1996
3. Multivariate Analysemethoden;Backhaus,1996
4. Isomer-specific identification of PCB congeners in technical mixtures and in environmental samples by HRGC-ECD and HRGC-MSD;Ballschmiter;Fresenius Z. Anal. Chem.,1987
5. Seabirds as monitor organisms of contaminants along the German North Sea coast;Becker;Helgol. Meeresunter.,1989