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Renata Walczak
Warsaw University of Technology, College of Economics and Social Sciences,Plock, Poland
Marlena Piekut
Warsaw University of Technology, College of Economics and Social Sciences,Plock, Poland
Magdalena Kludacz-Alessandri
Warsaw University of Technology, College of Economics and Social Sciences,Plock, Poland
Biruta Sloka
University of Latvia,Riga, Latvia
Ligita Šimanskiene
Klaipeda University,Klaipeda, Lithuania
Tiiu Paas
Tartu University,Tartu, Estonia