@book{150056,
	author = {Halphen, Louis},
	title = {Carlomagno y el imperio carolingio},
	publisher = {Ediciones Akal},
	year = {c1992.},
	series = {Akal universitaria. Serie historia antigua},
	address = {Madrid},
	note = {Translation of: Charlemagne et l'empire Carolingien.}
}