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
The Theoretical and Applied Informatics ceased publication with the 2017 issue (Volume 29, Number 1-2). Kopia danych z Czytelni Czasopism PAN - https://czasopisma.pan.pl/