Woods, Daniel (2008). 〈Heliograph and Mirrors〉. Sterling, Christopher. 《Military Communications: From Ancient Times to the 21st Century》. ABC-CLIO. 208쪽. ISBN978-1851097326. 2014년 7월 7일에 원본 문서에서 보존된 문서. 2019년 12월 15일에 확인함.
Reynolds, P. K. Baillie (1929). “The Shield Signal at the Battle of Marathon”. 《The Journal of Hellenic Studies》 49 (Part I): 100–105. doi:10.2307/625005. JSTOR625005.
Hodge, A. Trevor (2001). “Reflections on the Shield at Marathon”. 《The Annual of the British School at Athens》 96: 237–259. doi:10.1017/s0068245400005281. JSTOR30073279.
W. N. Millar (1920), Canadian Forestry Service. Methods of Communication Adapted to Forest Protection Google Books. Retrieved on 1 June 2008. pp. 160-181 are devoted to the heliograph, with diagrams of the British, American, and Godwin type.
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Mance, Henry (1872년 2월 10일). “The Heliograph or Sun Telegraph”. 《United Service Institution of India》 1 (5): 123–130. 2013년 6월 16일에 확인함.
Reynolds, P. K. Baillie (1929). “The Shield Signal at the Battle of Marathon”. 《The Journal of Hellenic Studies》 49 (Part I): 100–105. doi:10.2307/625005. JSTOR625005.
Hodge, A. Trevor (2001). “Reflections on the Shield at Marathon”. 《The Annual of the British School at Athens》 96: 237–259. doi:10.1017/s0068245400005281. JSTOR30073279.
Woods, Daniel (2008). 〈Heliograph and Mirrors〉. Sterling, Christopher. 《Military Communications: From Ancient Times to the 21st Century》. ABC-CLIO. 208쪽. ISBN978-1851097326. 2014년 7월 7일에 원본 문서에서 보존된 문서. 2019년 12월 15일에 확인함.