«LTING/1» [Архівовано 16 грудня 2017 у Wayback Machine.] Forsyth, K. (1996) «The Ogham Inscriptions of Scotland: An Edited Corpus». Unpublished PhD. Harvard University. Retrieved 12 July 2009.
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«Scotland’s Ogham inscriptions» [Архівовано 28 січня 2018 у Wayback Machine.] University of California, Riverside. Retrieved 12 July 2009. This paper quotes a 1969 radio talk by Douglas Gifford of the Department of Spanish of St. Andrew’s University, who said that Guiter had «twisted the evidence», but also suggested that the Basque connection was worth a further look.
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«Scotland’s Ogham inscriptions» [Архівовано 28 січня 2018 у Wayback Machine.] University of California, Riverside. Retrieved 12 July 2009. This paper quotes a 1969 radio talk by Douglas Gifford of the Department of Spanish of St. Andrew’s University, who said that Guiter had «twisted the evidence», but also suggested that the Basque connection was worth a further look.
«LTING/1» [Архівовано 16 грудня 2017 у Wayback Machine.] Forsyth, K. (1996) «The Ogham Inscriptions of Scotland: An Edited Corpus». Unpublished PhD. Harvard University. Retrieved 12 July 2009.