1. Predrag Kolarž (2021) "Influence of geological parameters on the concentration of indor radon in the city of Trebinje" - Contemporary Materials 2021 - Savremeni materijali
(https://ekonferencije.com/sr1/rad/influence-of-geological-parame/6001)

2. Predrag Kolarž (2020) "INDOOR RADON CONCENTRATION CORRELATED WITH THE GEOLOGICAL PAREEMETERS OF THE TREBINJE CITY, REPUBLIC OF SRPSKA" - Contemporary Materials 2020 - Savremeni Materijali
(https://ekonferencije.com/sr1/rad/indoor-radon-concentration-cor/5900)

3. Predrag Kolarž (2020) "MULTIVARIATE REGRESSION ANALYSIS OF INDOOR THORON DATA FROM NORTH MACEDONIA" - Contemporary Materials 2020 - Savremeni Materijali
(https://ekonferencije.com/sr1/rad/multivariate-regression-analys/5874)

4. Predrag Kolarž (2019) "Long-term measurements of equilibrium equivalent radon and thoron progeny concentrations in Republic of Srpska dwellings" - Contemporary Materials 2019 - Savremeni Materijali
(https://ekonferencije.com/sr1/rad/long-term-measurements-of-equi/5795)

5. Predrag Kolarž (2019) "Summarized results of the indoor radon and thoron concentrations in schools of Skopje (Republic of North Macedonia) and Banja Luka (Republic of Srpska) cities" - Contemporary Materials 2019 - Savremeni Materijali
(https://ekonferencije.com/sr1/rad/summarized-results-of-the-indo/5793)

6. Predrag Kolarž (2019) "DIURNAL AND SPATIAL VARIATIONS OF RADON AND ITS INFLUENCE ON IONIZATION OF THE NEARGROUND ATMOSPHERIC LAYER" - Contemporary Materials 2019 - Savremeni Materijali
(https://ekonferencije.com/sr1/rad/diurnal-and-spatial-variations/5733)

7. Predrag Kolarž (2018) "Comparison of indoor radon concentrations between schools in Skoplje and Banja Luka cities" - Contemporary Materials 2018 - Savremeni Materijali
(https://ekonferencije.com/sr1/rad/comparison-of-indoor-radon-con/5652)