1] prof Oskar Bera COMPARISON OF THE CARBON BLACK AND BIOCHAR IMPACT ON THE POWER CONSUMPTION DURING RUBBER MIXING" - Contemporary Materials 2021 - Savremeni materijali, 13.08.2021.
(https://ekonferencije.com/sr1/rad/comparison-of-the-carbon-black/6017)

2] prof Oskar Bera POVEĆANJE ENERGETSKE EFIKASNOSTI PRIMENOM TOPLOTNIH PUMPI " - XI Savjetovanje hemičara, tehnologa i ekologa Republike Srpske, 29.06.2016.
(https://ekonferencije.com/sr1/rad/pove-anje-energetske-efikasnos/4457)

3] prof Oskar Bera THE EFFECT OF ORGANICALLY MODIFIED MONTMORILLONITE ADDITION ON THE CURING KINETICS OF EPOXY/JEFFAMINE D-400 SYSTEMS" - Contemporary Materials 2015 - Savremeni Materijali, 14.06.2015.
(https://ekonferencije.com/sr1/rad/the-effect-of-organically-modi/3994)

4] prof Oskar Bera EFFECTS OF PROCESSING CONDITIONS ON THE THERMAL PROPERTIES OF VINYL FOAM FLOORING" - Contemporary Materials 2015 - Savremeni Materijali, 14.06.2015.
(https://ekonferencije.com/sr1/rad/effects-of-processing-conditio/3993)

5] prof Oskar Bera MATHEMATICAL MODELING OF THE INFLUENCE OF THE COMPOSITION AND PROCESSING CONDITIONS OF PVC PLASTISOL ON THE PROPERTIES OF PVC FLOOR COVERING USING ARTIFICIAL NEURAL NETWORK" - Contemporary Materials 2015 - Savremeni Materijali, 14.06.2015.
(https://ekonferencije.com/sr1/rad/mathematical-modeling-of-the-i/3992)