Authors
Stanisław Duży
Silesian University of Technology, Faculty of Mining and Geology, Gliwice, Poland
Grzegorz Dyduch
Silesian University of Technology, Faculty of Mining and Geology, Gliwice, Poland
Wojciech Preidl
Silesian University of Technology, Faculty of Mining and Geology, Gliwice, Poland
Grzegorz Stacha
Silesian University of Technology, Faculty of Mining and Geology, Gliwice, Poland