Adriana (University of Warsaw Mica Poland),Anna (University of Warsaw Horolets Poland),Mikolaj (University of Warsaw Pawlak Poland),Pawel (Warsaw School of Economics Kubicki Poland)
（1）
Mica, Adriana (University of Warsaw, Poland),Pawlak, Mikolaj (University of Warsaw, Poland),Horolets, Anna (University of Warsaw, Poland),Kubicki, Pawel (SGH Warsaw School of Economics, Poland)
（1）
；Mica, Adriana (University of Warsaw Poland),Pawlak, Mikolaj (University of Warsaw Poland),Horolets, Anna (University of Warsaw Poland),Kubicki, Pawel (SGH Warsaw School of Economics Poland)
（1）
