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Open Mathematics > 2015 > 13 > 1
Systems & Control Letters > 2014 > 68 > Complete > 76-85
Discussiones Mathematicae, Differential Inclusions, Control and Optimization > 2011 > 31 > 1 > 71-90
Aequationes mathematicae > 2007 > 74 > 3 > 314-317
Automatica > 2006 > 42 > 3 > 453-458
Annales Societatis Mathematicae Polonae. Seria 00001: Commentationes... > 2006 > Vol. 46, [Z] 1 > 25-36
Commentationes Mathematicae > 2006 > 46 > 1
Annales Polonici Mathematici > 1999 > 72 > 1 > 87-98