Authors
Anna Kamińska
Institute of Exact and Technical Sciences, Pomeranian University in Słupsk, Słupsk, Poland
Stanisław Kowalczyk
stanislaw.kowalczyk@apsl.edu.pl
Institute of Exact and Technical Sciences, Pomeranian University in Słupsk, Słupsk, Poland
Małgorzata Turowska
malgorzata.turowska@apsl.edu.pl
Institute of Exact and Technical Sciences, Pomeranian University in Słupsk, Słupsk, Poland