1. mr Igor Grujić (2019) "APPLICATION GOOGLE SOLUTIONS FOR EVALUATION EFFICIENCY AND COST OF APPLICATION QUALITY AND FOOD SAFETY MANAGEMENT SYSTEM" - Contemporary Materials 2019 - Савремени Материјали
(https://ekonferencije.com/sr/rad/application-google-solutions-f/5779)

2. mr Igor Grujić (2019) "3D PRINTING TECHNOLOGIES: A NOVEL POSSIBILITIES OF APPLICATION IN INDUSTRIAL PRODUCTION" - Contemporary Materials 2019 - Савремени Материјали
(https://ekonferencije.com/sr/rad/3d-printing-technologies-a-nov/5775)