1. Department of Economics and Finance, University in Kielce, Uniwersytecka 15, 25-406 Kielce, Poland
2. Department of Accounting, Faculty of Economics, Finance and Management, University of Szczecin, Mickiewicza 64, 71-101 Szczecin, Poland
3. Department of Logistics, Faculty of Management, University of Lodz, Matejki 22/26, 90-237 Łódź, Poland
4. Department of Finance, Banking and Accounting, Rzeszów University of Technology, al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland
5. Zielony Polska Waluta Lokalna, Bankowa 5, 27-200 Starachowice, Poland