@Book{BVMC:582444,
author = {Martínez Díez, Gonzalo},
title = {Origen del nombre de Extremadura},
publisher = {Alicante : Biblioteca Virtual Miguel de Cervantes, 2013},
year = {2013},
url = {https://www.cervantesvirtual.com/nd/ark:/59851/bmc4n0w2}
}