Klein, S., C. Domergue, Y. Lahaye, G.P. Brey, and H.-m. Von Kaenel. 2009. “The lead and copper isotopic composition of copper ores from the Sierra Morena (Spain)”. Journal of Iberian Geology 35, nº 1:: 59-68. https://revistas.ucm.es/index.php/JIGE/article/view/JIGE0909120059A