Authors
Irena Domnik
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