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Annales UMCS, Mathematica > 2015 > 69 > 1 > 23-57
Discussiones Mathematicae, Differential Inclusions, Control and Optimization > 2001 > 21 > 1 > 97-126
Annales UMCS, Mathematica > 2015 > 69 > 1 > 23-57
Discussiones Mathematicae, Differential Inclusions, Control and Optimization > 2001 > 21 > 1 > 97-126