Authors
Magdalena Wdowin
Mineral and Energy Economy Research Institute, Polish Academy of Sciences, Kraków, Poland
Mariusz Macherzyński
AGH University Science and Technology, Kraków, Poland
Rafał Panek
Lublin University of Technology, Lublin, Poland
Mateusz Wałęka
AGH University Science and Technology, Kraków, Poland
Jerzy Górecki
AGH University Science and Technology, Kraków, Poland