Refrencias: http://dadun.unav.edu/bitstream/10171/462/6/4.%20%C3%89TICA%20Y%20MORAL%20ORIGEN%20DE%20UNA%20DIFERENCIA%20CONCEPTUAL%20Y%20SU%20TRASCENDENCIA%20EN%20EL%20DEBATE%20%C3%89TICO%20CONTEMPOR%C3%81NEO,%20ANA%20MARTA%20GONZ%C3%81LEZ.pdf