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<references/>
==Bibliografia ==
*{{en}}Chevedden e al., Scientific American, 1995, cap: The Trebuchet [http://web.archive.org/web/20040726001919/http://www.deremilitari.org/resources/pdfs/trebuchet.pdf en linha
*{{en}}Paul E. Chevedden; Dumbarton Oaks Papers, No. 54; cap: The Invention of the Counterweight Trebuchet:A Study in Cultural Diffusion (TEXT) [http://web.archive.org/web/20040723113719/http://www.doaks.org/DOP54/DP54ch4.pdf en linha]
*{{en}}Byzantine Heavy Artillery: The Helepolis in Greek, Roman, and Byzantine Studies, 1998
*{{en}}Christopher Gravett; Medieval Siege Warfare; ed: Osprey Publishing}
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{{commons|Trebuchet|trabuc}}
* {{en}}[http://www.pbs.org/wgbh/nova/lostempires/trebuchet/ Secrets of Lost Empires: Medieval Siege (building of and history of trebuchets)], from the [[Nova (TV series)|NOVA]] website
*{{en}}[http://web.archive.org/web/20040525103721/http://www.algobeautytreb.com/trebmath35.pdf Trebuchet Mechanics] {{pdf}})
*{{en}}[http://www.fvc3.com/videos/trebuchet.html Video of a Spring Trebuchet in action]
*{{en}}[http://www.catapults.info/trebuchets Historical accounts of the Trebuchet]
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