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Frothingham, A. L., Jr. Italic Studies. Archaeological News. American Journal of Archaeology. 1891, 7 (4): 534 [27 October 2020]. JSTOR 496497. (原始内容存档于18 February 2022).
Frothingham, A. L., Jr. Italic Studies. Archaeological News. American Journal of Archaeology. 1891, 7 (4): 534 [27 October 2020]. JSTOR 496497. (原始内容存档于18 February 2022).
Cyrillic Alphabet. Encyclopedia Britannica. [25 May 2018]. (原始内容存档于26 May 2018) (英语).
Silvestre, M. J. B. Universal Palaeography. 由Madden, Frederic翻译. London: Henry G. Bohn. 1850 [27 October 2020]. (原始内容存档于7 May 2021) (英语).
Frothingham, A. L., Jr. Italic Studies. Archaeological News. American Journal of Archaeology. 1891, 7 (4): 534 [27 October 2020]. JSTOR 496497. (原始内容存档于18 February 2022).