6Stephon.P.A.Brown and Mine K,Yucel, Energy Prie and Aggregate Economic Activity: An InterpretatiVe Survey, The Quarterly Review of Economics and Finance, Vol.42,2002,pp,193-208.
5Gorden, Ian. Economic Forecaster & Interpreter of the Kondratieff Cycles. http://www, thelongwaveanalyst, ca/news html 2007-11.
6Reinhart,C. M. ,Rogoff, KI S. Is the 2007 U.S. Sub-Prime Financial Crisis So Different? An International Historical Comparison. NBER working peper No13761, Jan 2008.
7Reinhart,C. M. ,Rogoff, K. S. This Time is Different: A Panoramic View of Eight Centuries of Financial Crises. NBER working peper No13882,April 2008.