TY - BOOK AU - Alexy,Robert TI - The argument from injustice: a reply to legal positivism / SN - 0198259875 PY - 2002///, 2004 repr CY - Oxford : PB - Clarendon Press, KW - Legal positivism KW - Effectiveness and validity of law KW - Positivismo jurĂ­dico KW - Derecho KW - FilosofĂ­a ER -