
http://www.epc.eu/documents/uploads/pub_8839_19_11_ecc_web.pdf?doc_id=2065

https://www.lobbycontrol.de/parteienfinanzierung/parteispenden-deutschland-ist-das-intransparenteste-land-in-europa-115718/

https://www.crisisgroup.org/es/latin-america-caribbean/andes/venezuela/101-navigating-venezuelas-political-deadlock-road-elections