Publikacja dostępna w wersji elektronicznej w formule open access na licencji CC BY 4.0. Submitted 21/03/21, 1st revision 19/04/21, 2nd revision 24/05/21, accepted 30/06/21. The project is financed within the framework of the program of the Minister of Science and Higher Education under the name "Regional Excellence Initiative" in the years 2019-2022. The article is co-financed by Institute of Management of the University of Szczecin. |
