1. mr Marko Orošnjak (2017) "Significance of hydraulic system working fluid maintenance with integrated logic and built-in components" - 13th International Conference on Accomplishments in Mechanical and Industrial Engineering
(https://ekonferencije.com/sr1/rad/significance-of-hydraulic-syst/4778)

2. mr Marko Orošnjak (2017) "Lubricating oils for automotive natural gas engines" - 13th International Conference on Accomplishments in Mechanical and Industrial Engineering
(https://ekonferencije.com/sr1/rad/lubricating-oils-for-automotiv/4763)