1 Retraction Note: Qual Quant (2017) 51:1133–1146 https://doi.org/10.1007/s11135-016-0321-6

The Editor-in-Chief has retracted this article Marković et al. (2016) because validity of the content of this article cannot be verified. This article showed evidence of peer review and authorship manipulation. Author Dusan Markovic stated he was not aware of being included as an author of this article. Authors Igor Mladenovic and Miloš Milovancevic have not responded to any correspondence from the editor or publisher about this retraction.