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Vietnam Journal of Mathematics > 2014 > 42 > 4 > 467-478
Applied Mathematics & Optimization > 2012 > 66 > 3 > 455-473
Annales de l'Institut Henri Poincare / Analyse non lineaire > 2008 > 25 > 4 > 743-771
Annals of Operations Research > 2001 > 101 > 1-4 > 209-220
Discussiones Mathematicae, Differential Inclusions, Control and Optimization > 2000 > 20 > 2 > 195-207