1Richard B. Stewart,1977. "Pyramids of Sacri- fice.Problems of Federalism in Mandating State Implementation of National Environmental Poli- ey",Yale Law Journal,pp.1196-1272.
2Wallace E.Oates,Robert M.Schwab,1988."Eco- nomic competition among jurisdictions. efficiency enhancing or 'distortion inducing?". Journal of public economics, pp.333-354.