http://www.orlenunipetrol.cz/en/InvestorRelations/archive/RegulatoryAnnouncements/Pages/Unplanned-maintenance-shutdowns-of-main-installations.aspx
http://www.orlenunipetrol.cz/en/InvestorRelations/archive/RegulatoryAnnouncements/Pages/2008-Semi-annual-Report-29-08-2008.aspx
http://www.orlenunipetrol.cz/en/InvestorRelations/archive/GeneralMeeting/Pages/2017.aspx
http://www.orlenunipetrol.cz/en/InvestorRelations/archive/RegulatoryAnnouncements/Pages/Unipetrol-RPA-acquires-Spolana-as.aspx
http://www.orlenunipetrol.cz/en/InvestorRelations/archive/RegulatoryAnnouncements/Pages/NOTIFICATION-UNDER-SECTION-120-(1)-(E)-OF-CAPITAL-MARKETS-ACT-13-11-2007.aspx
http://www.orlenunipetrol.cz/en/InvestorRelations/archive/RegulatoryAnnouncements/Pages/Inside-information-03-02-2009.aspx
http://www.orlenunipetrol.cz/en/InvestorRelations/archive/RegulatoryAnnouncements/Pages/Inside-information-02-02-2010.aspx
http://www.orlenunipetrol.cz/en/InvestorRelations/archive/RegulatoryAnnouncements/Pages/Change-in-composition-of-Supervisory-Board-of-UNIPETROL-as.aspx [View duplicates]
http://www.orlenunipetrol.cz/en/InvestorRelations/archive/RegulatoryAnnouncements/Pages/Changes-in-the-Board-of-Directors-of-CHEMOPETROL,-a.s.-01-06-2006.aspx
http://www.orlenunipetrol.cz/en/InvestorRelations/archive/RegulatoryAnnouncements/Pages/Unipetrol-Group’s-structure-changes-2016.aspx