1. P. Pravdić, V. Đorđević (2025). EKO-MATERIJALI I EKO-TEHNOLOGIJE U MAŠINSTVU. Contemporary Materials 2025 - Savremeni Materijali , 11.-12. septembar. Banja Luka,
Republic of Srpska, Bosnia and Herzegovina ( https://ekonferencije.com/paper/view/6658 )
2. P. Pravdić, V. Đorđević (2025). BIOMATERIJALI U MODERNOJ MAŠINSKOJ INDUSTRIJI. Contemporary Materials 2025 - Savremeni Materijali , 11.-12. septembar. Banja Luka,
Republic of Srpska, Bosnia and Herzegovina ( https://ekonferencije.com/paper/view/6657 )
3. P. Pravdić, V. Đorđević (2025). ECOLOGICALLY SUSTAINABLE MATERIALS – THEIR APPLICATIONS AND ENVIRONMENTAL IMPACT. Contemporary Materials 2025 - Savremeni Materijali , 11.-12. septembar. Banja Luka,
Republic of Srpska, Bosnia and Herzegovina ( https://ekonferencije.com/paper/view/6656 )