Hatzopoulos 1997, p. 145: "The Illyrian origins of the Encheleis, too, are debatable, but the question is of rather academic character, since in the Classical and Hellenistic periods, there were rather a historical memory than a contemporary ethnic group." Hatzopoulos, M. B. (1997). "The Borders of Hellenism in Epirus during Antiquity". In M. V. Sakellariou (ed.). Ηπειρος: 4000 χρόνια ελληνικής ιστορίας και πολιτισμού. Ekdotike Athenon. ISBN9789602133712.
Theodossiev 1998, p. 348. Theodossiev, Nikola (1998). "The dead with golden faces: Dasaretian, Pelagonian, Mygdonian and Boeotian funeral masks". Oxford Journal of Archaeology. 17 (3). Blackwell Publishing: 345–367. doi:10.1111/1468-0092.00067.
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Cadmus: "After having many children, Cadmus and Harmonia left Thebes in order to defend the Encheleans, a people living in southern Illyria, which is the region north of Epirus, and there defeated the Illyrian intruders..."