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Nonparametric verification of GARCH-class models for selected Polish exchange rates and stock indices / Piotr Fiszeder, Witold Orzeszko . Finance a úvěr.Roč. 62, č. 5 (2012), s. 430-449. DEA-risk efficiency and stochastic dominance efficiency of stock indices / Martin Branda, Miloš Kopa . Finance a úvěr.Roč. 62, č. 2 (2012), s. 106-124.