Eska, Joseph F. (March 12, 2018). "Laryngeal Realism and the Prehistory of Celtic". Transactions of the Philological Society. 116 (3). Wiley: 320–331. doi:10.1111/1467-968x.12122. ISSN0079-1636.
Cólera, Carlos Jordán (2007) "Celtiberian," e-Keltoi: Journal of Interdisciplinary Celtic Studies: Vol. 6, Article 17. p. 772 Available at: https://dc.uwm.edu/ekeltoi/vol6/iss1/17
Cólera, Carlos Jordán (2007) "Celtiberian," e-Keltoi: Journal of Interdisciplinary Celtic Studies: Vol. 6, Article 17. p. 772 Available at: https://dc.uwm.edu/ekeltoi/vol6/iss1/17
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Eska, Joseph F. (March 12, 2018). "Laryngeal Realism and the Prehistory of Celtic". Transactions of the Philological Society. 116 (3). Wiley: 320–331. doi:10.1111/1467-968x.12122. ISSN0079-1636.