6Archibald Cox, The Supreme Court and the Federal System., in Kermit L Hall (ed.), A Nation of States: Federalism at the Bar of the Supreme Court. New York & London: Garland Publishing INC, p. 104,2000.
7Michael S Greve, Real Federalism: Why it Matters, How it could Happen, Washington D C : The AEI Press, p. 14,1999.
8Charlie Jeffery et al. , Recasting German Federalism: The Legacies of Unification, Pinter, 1999.
9Cole, West German Federalism Revisited, American Journal of Comparative Law, 23, pp.325 - 336.
10Herbert Wechsler, The Political Safeguards of Federalism : The Role of the States in the Composition and Selection of the National Government, Columbia Law Review, p.543, 1954.