Hannes Hofmann, Martin C. Schleper, Constantin Blome: Conflict Minerals and Supply Chain Due Diligence: An Exploratory Study of Multitier Supply Chains. In: Journal of Business Ethics.doi:10.1007/s10551-015-2963-z
Dodd–Frank Act, Auszug: The term conflict mineral means (A) columbite-tantalite (coltan), cassiterite, gold, wolframite, or their derivatives; or (B) any other mineral or its derivatives determined by the Secretary of State to be financing conflict in the Democratic Republic of the Congo or an adjoining country.