http://www.orlenunipetrol.cz/en/csr-page/documents-and-reports/Pages/Environment.aspx [View duplicates]
http://www.orlenunipetrol.cz/en/Media/PressReleases/Pages/statement-accident.aspx
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http://www.orlenunipetrol.cz/en/Media/PressReleases/Pages/The-request-to-call-EGM.aspx
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http://www.orlenunipetrol.cz/en/Media/PressReleases/Pages/20200331_Litvinov_zarazka_EN.aspx
http://www.orlenunipetrol.cz/en/InvestorRelations/AnnualandSemi-annualReports/Pages/2018.aspx
http://www.orlenunipetrol.cz/en/Media/PressReleases/Pages/Change-on-the-Spokesman-position.aspx