Herfindahl-Hirschman index level of concentration values modification and analysis of their change. - Ivan Brezina; Juraj Pekár; Zuzana Cicková; Marian Reiff (Central Eur. J. Oper. Res., 2016)

The composition diagram of a complex process: Enhancing understanding of hierarchical business processes. - Pavol Jurik; Peter Schmidt; Martin Misut; Ivan Brezina; Marian Reiff (Inf. Syst., 2025)