Dr Zoran Stevanovic, red. prof.

e-mail: zstev_2000@yahoo.co.uk

Dr Sasa Milanovic, dipl. ing. geol.

e-mail: sasamilanovic@rgf.bg.ac.rs

Ljiljana Vasic, dipl.ing. geol.

e-mail: lilydhg@rgf.bg.ac.rs