[1] Univ Econ, Fac Int Relat, Winston Churchill Sq 4, CZ-13067 Prague 3, Czech Republic
[2] Metropolitan Univ Prague, Dept Law & Publ Adm, Dubecska 900-10, CZ-10031 Prague 10, Czech Republic
[3] Univ Szczecin, Fac Econ Sci & Management, Ul Mickiewicza 64, PL-71101 Szczecin, Poland
[4] Charles Univ Prague, Fac Social Sci, Smetanovo 6, CZ-11001 Prague 1, Czech Republic