Autori:
1. Nemanja Zdjelar, Elektrometal, Traffic and Construction, Cazin, Federation of Bosnia and Herzegovina , Bosnia and Herzegovina
2. Ljubica Figun, Rudarski fakultet Prijedor, Republic of Srpska, Bosnia and Herzegovina
3. Novica Cvijetić, 3EFT - Stanari d.o.o. Stanari, BiH, Republic of Srpska, Bosnia and Herzegovina
4. Jelena Trivan, Rudarski institut Prijedor, e-mail Save Kovačevića bb, Prijedor, Republic of Srpska, Bosnia and Herzegovina

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