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Commentationes Mathematicae > 2009 > 49 > 2
Discussiones Mathematicae, Differential Inclusions, Control and Optimization > 2008 > 28 > 1 > 147-164
Commentationes Mathematicae > 2009 > 49 > 2
Discussiones Mathematicae, Differential Inclusions, Control and Optimization > 2008 > 28 > 1 > 147-164