Gertler, Dan (DGI Group). In: rough-polished.com. 3. Dezember 2009, archiviert vom Original am 13. November 2011; abgerufen am 15. Oktober 2021.
Dan Gertler $1.22 B. In: forbes.com. 6. November 2017, archiviert vom Original am 7. November 2017; abgerufen am 15. Oktober 2021.
theguardian.com
Ben Doherty, Oliver Zihlmann: Revealed: Glencore's secret loan to secure DRC mining rights. In: The Guardian. 5. November 2017, ISSN0261-3077 (theguardian.com [abgerufen am 6. November 2017]).
Ben Doherty: Everything you need to know about Glencore, Dan Gertler and their interest in DRC. In: The Guardian. 5. November 2017, ISSN0261-3077 (theguardian.com [abgerufen am 6. November 2017]).
Ben Doherty, Oliver Zihlmann: Revealed: Glencore's secret loan to secure DRC mining rights. In: The Guardian. 5. November 2017, ISSN0261-3077 (theguardian.com [abgerufen am 6. November 2017]).
Ben Doherty: Everything you need to know about Glencore, Dan Gertler and their interest in DRC. In: The Guardian. 5. November 2017, ISSN0261-3077 (theguardian.com [abgerufen am 6. November 2017]).