1] mr Igor Grujić APPLICATION GOOGLE SOLUTIONS FOR EVALUATION EFFICIENCY AND COST OF APPLICATION QUALITY AND FOOD SAFETY MANAGEMENT SYSTEM" - Contemporary Materials 2019 - Savremeni Materijali, 31.07.2019.
(https://ekonferencije.com/en/paper/application-google-solutions-f/5779)

2] mr Igor Grujić 3D PRINTING TECHNOLOGIES: A NOVEL POSSIBILITIES OF APPLICATION IN INDUSTRIAL PRODUCTION" - Contemporary Materials 2019 - Savremeni Materijali, 30.07.2019.
(https://ekonferencije.com/en/paper/3d-printing-technologies-a-nov/5775)