1. Dušan Golubović (2021) "PRODUCTION REQUIRES AN APPRECIATION OF THE PHYSICAL AND CHEMICAL CHARACTERISTICS OF THE MATERIAL FOR MACHINING" - Contemporary Materials 2021 - Savremeni materijali
(https://ekonferencije.com/sr1/rad/production-requires-an-appreci/6024)

2. Dušan Golubović (2021) "DETERMINATION OF WARNING PRODUCTS IN CONTACT OF TOOL STEEL AND IYOTHERMALLY IMPROVED NODULAR CAST" - Contemporary Materials 2021 - Savremeni materijali
(https://ekonferencije.com/sr1/rad/determination-of-warning-produ/6014)