@book{33531,
	author = {Kelsen, Hans. and Calsamiglia, Albert,},
	title = {Que es justicia? /},
	publisher = {Ariel,},
	year = {1992.},
	series = {Obras maestras del pensamiento contemporaneo ;},
	address = {Madrid :},
	edition = {3a ed.},
	note = {Titulo original. What is justice.}
}