Giles 1841:24–25, De Excidio, sections 28 and 29 (in English) Giles, John Allen, ed. (1841), The Works of Gildas and Nennius, London: James Bohn — English translation.
Giles 1841:244–245, De Excidio, sections 28 and 29 (in Latin) Giles, John Allen, ed. (1841), The Works of Gildas and Nennius, London: James Bohn — English translation.
Roberts, Brynley F.; Bromwich, Rachel (1962). "Trioedd Ynys Prydein. The Welsh Triads". The Modern Language Review. 57 (3): 405. doi:10.2307/3721837. ISSN0026-7937. JSTOR3721837.
Roberts, Brynley F.; Bromwich, Rachel (1962). "Trioedd Ynys Prydein. The Welsh Triads". The Modern Language Review. 57 (3): 405. doi:10.2307/3721837. ISSN0026-7937. JSTOR3721837.
Roberts, Brynley F.; Bromwich, Rachel (1962). "Trioedd Ynys Prydein. The Welsh Triads". The Modern Language Review. 57 (3): 405. doi:10.2307/3721837. ISSN0026-7937. JSTOR3721837.