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

2. prof Oskar Bera (2016) "POVEĆANJE ENERGETSKE EFIKASNOSTI PRIMENOM TOPLOTNIH PUMPI " - XI Savjetovanje hemičara, tehnologa i ekologa Republike Srpske
(https://ekonferencije.com/sr1/rad/pove-anje-energetske-efikasnos/4457)

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

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

5. prof Oskar Bera (2015) "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
(https://ekonferencije.com/sr1/rad/mathematical-modeling-of-the-i/3992)