@book{Hoyo2015,
author = {Hoyo, Henio},
year = {2015},
language = {spa},
copyright = {http://www.fu-berlin.de/sites/refubium/rechtliches/Nutzungsbedingungen},
title = {Apertura externa, exclusión interna},
url = "http://dx.doi.org/10.17169/refubium-23500",
}