Mikołajczak, Paweł http://orcid.org/0000-0002-7662-2565
Bajak, Piotr
Funding for this research was provided by:
Poznan University of Economics and Business
Article History
First Online: 26 June 2020
Compliance with Ethical Standards
:
: We declare that We have no conflict of interest.We declare that the article has not been financed by grants, funds, etc. and does not require any permission from any organization.We declare that our contribution to the work is as follows (table below) and there is no conflict of interest between authors.