Authors
Mykola Stupnik
Kryvyi Rih National University, Faculty of Mining and Metallurgy, KryvyiRih, Ukraine
Vsevolod Kalinichenkо
Kryvyi Rih National University, Faculty of Mining and Metallurgy, KryvyiRih, Ukraine
Olena Kalinichenko
Kryvyi Rih National University, Faculty of Mining and Metallurgy, KryvyiRih, Ukraine
Oleksandr Shepel
Kryvyi Rih National University, Faculty of Mining and Metallurgy, KryvyiRih, Ukraine
Volodymyr Pilchyk
Ukraine