http://serbal.pntic.mec.es/dbeo0001/literatura_medieval/literatura_medieval_08.htm
https://oggisioggino.wordpress.com/2012/10/31/mio-cid-caracteristicas-y-contexto-historico-literario/https://literaturapuraydura.blogspot.com.es/2009/01/fragmento-de-el-cantar-de-mo-cid.html
