Malgorzata Rozkwitalska-Welenc,Beata A. (Gdansk University of Technology Basinska Poland),Alicja Dettlaff
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Malgorzata Rozkwitalska-Welenc,Jacek (WSB University in Gdansk Borzyszkowski Poland),Beata A. (Gdansk University of Technology Basinska Poland),Fevzi (University of Central Florida Okumus USA),Osman M
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