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IEEE Transactions on Sustainable Energy > 2017 > 8 > 1 > 331 - 340
IEEE Transactions on Sustainable Energy > 2012 > 3 > 4 > 692 - 702
IEEE Transactions on Sustainable Energy > 2012 > 3 > 4 > 769 - 776
IEEE Transactions on Power Systems > 2009 > 24 > 2 > 592 - 601