„Selk'nam”. La enciclopedia de ciencias y tecnologías en Argentina (на језику: Spanish). 1. 12. 2013. Приступљено 23. 12. 2020.CS1 одржавање: Формат датума (веза)CS1 одржавање: Непрепознат језик (веза)
Richardson, William A.R. (2003). „South America on Maps before Columbus? Martellus's 'Dragon's Tail' Peninsula”. Imago Mundi. 55: 25—37. S2CID129171245. doi:10.1080/0308569032000097477. „For some decades a group of scholars in Latin America has been claiming that this so-called 'Dragon's Tail' peninsula is really a pre-Columbian map of South America. In this paper, the cartographical and place-name evidence is examined, showing that the identification has not been proved, and that perceived similarities between the river and coastal outlines on this 'Dragon's Tail' peninsula and those of South America are fortuitous.”
Richardson, William A.R. (2003). „South America on Maps before Columbus? Martellus's 'Dragon's Tail' Peninsula”. Imago Mundi. 55: 25—37. S2CID129171245. doi:10.1080/0308569032000097477. „For some decades a group of scholars in Latin America has been claiming that this so-called 'Dragon's Tail' peninsula is really a pre-Columbian map of South America. In this paper, the cartographical and place-name evidence is examined, showing that the identification has not been proved, and that perceived similarities between the river and coastal outlines on this 'Dragon's Tail' peninsula and those of South America are fortuitous.”