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Journal of International Financial Markets, Institutions and Money > 2017 > 48 > C > 160-177
Physica A: Statistical Mechanics and its Applications > 2003 > 324 > 1-2 > 81-88
Energy Economics > 2003 > 25 > 3 > 255-268
Applied Mathematics & Optimization > 2000 > 42 > 1 > 19-33