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Palczewski, Marek, SWPS University of Social Sciences and Humanities in Warsaw (Poland)
Peicheva, Dobrinka, The Neophyte Rilski South-West University of Blagoevgrad (Bulgaria)
Pleszczyński, Jan, Maria Curie-Sklodowska University (Poland)
Ptaszek, Grzegorz, AGH University of Science and Technology, Krakow, Poland (Poland)
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ISSN: 2720-6106