See Joseph Raz, "Legal Principles and The Limits of Law",Yale Law Journal, vol. 81,1972,p.839.
SeeAleksander Peczenik, On Law an.d Reason, Dordrecht/Boston/London: Kluwer Aca-demic Publishers,1989,p.114 - 116.
Tom Ginsburg, "East Asian Constitutionalism in Comparative Perspective", in Albert H.Y. Chen,ed*,Constitutionalism in Asiai,lthe Early Twenty - First Century, Cambridge: Cam-bridge University Press, 2014,p.39.