About the Authors

Otakar Ungerman

Roles Conceptualization, Methodology, Resources, Validation, Writing – original draft

Affiliation Faculty of Economics, Department of Marketing, Technical University of Liberec, Liberec, Czech Republic

Jaroslava Dědková

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

jaroslava.dedkova@tul.cz

Affiliation Faculty of Economics, Department of Marketing, Technical University of Liberec, Liberec, Czech Republic

Competing Interests

The authors have declared that no competing interests exist.