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Discussiones Mathematicae, Differential Inclusions, Control and Optimization > 2011 > 31 > 1 > 115-132
Fundamenta Mathematicae > 1999 > 162 > 1 > 65-89
Discussiones Mathematicae, Differential Inclusions, Control and Optimization > 2011 > 31 > 1 > 115-132
Fundamenta Mathematicae > 1999 > 162 > 1 > 65-89