Chun-Cheng Lin and Rou-Xuan He and Wan-Yu Liu.
Considering Multiple Factors to Forecast CO2 Emissions: A Hybrid Multivariable Grey Forecasting and Genetic Programming Approach.
Energies, 11(12) 2018.
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Yi-Shian Lee and Wan-Yu Liu.
Forecasting value of agricultural imports using a novel two-stage hybrid model.
Computers and Electronics in Agriculture, 104:71-83, 2014.
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