„The Human Journey: Early Settlements in Europe”. www.humanjourney.us. Приступљено 24. 03. 2017. „Human fossil evidence from sites such as Atapuerca in Spain suggests that they were a form of Homo erectus (sometimes called Homo ergaster).”
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„Ancient Crete”. Oxfordbibliographiesonline.com. 15. 02. 2010. Архивирано из оригинала 30. 05. 2020. г. Приступљено 17. 05. 2012.