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IEEE Transactions on Sustainable Energy > 2011 > 2 > 1 > 28 - 36
IEEE Power and Energy Magazine > 2009 > 7 > 3 > 63 - 76
IEEE Transactions on Sustainable Energy > 2011 > 2 > 1 > 28 - 36
IEEE Power and Energy Magazine > 2009 > 7 > 3 > 63 - 76