Autori:
1. Milanka Negovanović, University of Belgrade, Faculty of Mining and Geology, Serbia
2. Lazar Kričak, University of Belgrade, Faculty of Mining and Geology, Serbia
3. Dražana Tošić, Univerzitet u Banjoj Luci, Republic of Srpska, Bosnia and Herzegovina
4. Snežana Ignjatović, University of Belgrade, Faculty of Mining and Geology, Serbia

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