2024-03-29T10:51:45Z
https://journals.umcs.pl/index/oai
oai:ojs.umcsd.home.net.pl:article/7677
2022-02-09T07:43:46Z
et:FO
oai:ojs.umcsd.home.net.pl:article/7673
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et:FO
oai:ojs.umcsd.home.net.pl:article/1972
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et:FO