@book{257535,
	author = {Keul, Hildegund, and Otero Villena, Almudena,},
	title = {Matilde de Magdeburgo :},
	publisher = {Herder,},
	year = {2016.},
	address = {Barcelona :},
	edition = {1a. edición digital.},
	url = {https://www.digitaliapublishing.com/a/61269/}
}