About the Authors

Anna L. Wieczorek

Roles Conceptualization, Data curation, Investigation, Methodology, Project administration, Resources, Writing – review & editing

awieczorek@ath.bielsko.pl

Affiliation University of Bielsko-Biala, Bielsko-Biala, Poland

Maciej Mitręga

Roles Conceptualization, Data curation, Formal analysis, Funding acquisition, Investigation, Methodology, Project administration, Resources, Software, Supervision, Validation, Visualization, Writing – original draft, Writing – review & editing

Affiliation University of Economics in Katowice, Katowice, Poland

Vojtěch Spáčil

Roles Conceptualization, Formal analysis, Methodology, Writing – original draft, Writing – review & editing

Affiliation VSB—Technical University of Ostrava, Ostrava, Czech Republic

Competing Interests

The authors have declared that no competing interests exist.