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Open Mathematics > 2015 > 13 > 1
Discussiones Mathematicae, Differential Inclusions, Control and Optimization > 2011 > 31 > 1 > 71-90
Open Mathematics > 2015 > 13 > 1
Discussiones Mathematicae, Differential Inclusions, Control and Optimization > 2011 > 31 > 1 > 71-90