[1] Univ Zilina, Dept Econ, Zilina, Slovakia
[2] Univ Debrecen, Fac Econ & Business, Debrecen, Hungary
[3] Czech Univ Life Sci, Dept Trade & Finance, Fac Econ & Management, Prague, Czech Republic
[4] Univ Johannesburg, Coll Business & Econ, ZA-2006 Johannesburg, South Africa
[5] Univ Gdansk, Inst Int Business, Gdansk, Poland
[6] Univ Zilina, Dept Crisis Management, Zilina, Slovakia