As of 1 April 2026, the PSJD database will become an archive and will no longer accept new data. Current publications from Polish scientific journals are available through the Library of Science: https://bibliotekanauki.pl
Co-occurrence of psammonic ciliates and rotifers in eutrophic lake (Łęczna-Włodawa Lakeland) Współwystępowanie orzęsków i wrotków psammonowych w jeziorze eutroficznym (Pojezierze Łęczyńsko-Włodawskie)