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Optimization Letters > 2012 > 6 > 8 > 1819-1830
Nonlinear Analysis > 2011 > 74 > 18 > 7261-7268
Journal of Optimization Theory and Applications > 2011 > 150 > 1 > 188-193
Journal of Optimization Theory and Applications > 2011 > 151 > 2 > 418-424