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Poema de Fernàn Gonzàlez. S. XIII.
http://www.cervantesvirtual.com/servlet/SirveObras/05812752100547273089079/index.htm

La Chanson de Roland. SXI.
http://www.hs-augsburg.de/~harsch/gallica/Chronologie/11siecle/Roland/rol_ch00.html

Symeon Metaphrastes. Epistolae. S. X.
http://www.documentacatholicaomnia.eu/04z/z_0950-1050__Symeon_Metaphrastes__Epistolae_(MPG_114_0227_0236)__GM.pdf.html

Pope John VIII: Indulgence for Fighting the Heathen. SIX.
http://www.fordham.edu/halsall/source/john2-ind878.html

Theophanes Abbas Confessor. Chonographia S. VIII.
http://www.documentacatholicaomnia.eu/04z/z_0700-0800__Theophanes_Abbas_Confessor__Chronographia_(CSHB_Classeni_Recensio)__GR.pdf.html