Opel Group GmbH, Rüsselsheim: Jahresabschluss zum Geschäftsjahr vom 01.01.2015 bis zum 31.12.2015 (german). To retrieve at: Bundesanzeiger > Suchen > Opel Group GmbH. 26 Ekim 2016 tarihinde Wayback Machine sitesinde arşivlendi. Bundesministerium der Justiz und für Verbraucherschutz.
"Lutzmann". Cartype. 6 Temmuz 2017 tarihinde kaynağından arşivlendi. Erişim tarihi: 13 Haziran 2009.
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"Opel" (İngilizce). 6 Aralık 2013. 26 Ekim 2018 tarihinde kaynağından arşivlendi. Erişim tarihi: 1 Ekim 2016.
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Note: The powertrain plant Opel Wien GmbH in Aspern/Viyana (Austria) is not a subsidiary of Adam Opel AG but a first-tier subsidiary of General Motors Europe Limited (GME) (99.5%) and of GM AUTOMOTIVE UK (GMAUK) (0.5%), see "Opel Wien GmbH, FN 110500a". FirmenABC Marketing GmbH. 12 Haziran 2018 tarihinde kaynağından arşivlendi. Erişim tarihi: 3 Nisan 2017. Both, GME and GMAUK, are located in Luton. GME Ltd. itself is a daughter company of GM CME Holdings CV, which is directly controlled by the General Motors Corporation (GMC), see "Name: GENERAL MOTORS EUROPE LIMITED, Company Number: 07556915". Company search, Made Simple Group Ltd. 12 Haziran 2018 tarihinde kaynağından arşivlendi. Erişim tarihi: 3 Nisan 2017.
Note: The powertrain plant Opel Wien GmbH in Aspern/Viyana (Austria) is not a subsidiary of Adam Opel AG but a first-tier subsidiary of General Motors Europe Limited (GME) (99.5%) and of GM AUTOMOTIVE UK (GMAUK) (0.5%), see "Opel Wien GmbH, FN 110500a". FirmenABC Marketing GmbH. 12 Haziran 2018 tarihinde kaynağından arşivlendi. Erişim tarihi: 3 Nisan 2017. Both, GME and GMAUK, are located in Luton. GME Ltd. itself is a daughter company of GM CME Holdings CV, which is directly controlled by the General Motors Corporation (GMC), see "Name: GENERAL MOTORS EUROPE LIMITED, Company Number: 07556915". Company search, Made Simple Group Ltd. 12 Haziran 2018 tarihinde kaynağından arşivlendi. Erişim tarihi: 3 Nisan 2017.
Opel Group GmbH, Rüsselsheim: Jahresabschluss zum Geschäftsjahr vom 01.01.2015 bis zum 31.12.2015 (german). To retrieve at: Bundesanzeiger > Suchen > Opel Group GmbH. 26 Ekim 2016 tarihinde Wayback Machine sitesinde arşivlendi. Bundesministerium der Justiz und für Verbraucherschutz.
Note: The powertrain plant Opel Wien GmbH in Aspern/Viyana (Austria) is not a subsidiary of Adam Opel AG but a first-tier subsidiary of General Motors Europe Limited (GME) (99.5%) and of GM AUTOMOTIVE UK (GMAUK) (0.5%), see "Opel Wien GmbH, FN 110500a". FirmenABC Marketing GmbH. 12 Haziran 2018 tarihinde kaynağından arşivlendi. Erişim tarihi: 3 Nisan 2017. Both, GME and GMAUK, are located in Luton. GME Ltd. itself is a daughter company of GM CME Holdings CV, which is directly controlled by the General Motors Corporation (GMC), see "Name: GENERAL MOTORS EUROPE LIMITED, Company Number: 07556915". Company search, Made Simple Group Ltd. 12 Haziran 2018 tarihinde kaynağından arşivlendi. Erişim tarihi: 3 Nisan 2017.