1] Predrag Zivkovic DETERMINING THE RELIABILITY OF PLANETARY GEAR FOR RATIONAL DEVELOPMENT OF STRUCTURAL SOLUTIONS " - 13th International Conference on Accomplishments in Mechanical and Industrial Engineering, 02.02.2017.
(https://ekonferencije.com/sr1/rad/determining-the-reliability-of/4784)

2] Predrag Zivkovic HEAT BALANCE OF LOSSES IN PLANETARY GEAR DRIVES" - 12. Međunarodna konferencija o dostignućima elektrotehnike, mašinstva i informatike, 03.03.2015.
(https://ekonferencije.com/sr1/rad/heat-balance-of-losses-in-plan/3029)

3] Predrag Zivkovic PARAMETRIC MODELING OF GEOMETRY SHAPES OF GEAR TEETH BY USING CAD SOFTWARE" - 12. Međunarodna konferencija o dostignućima elektrotehnike, mašinstva i informatike, 03.03.2015.
(https://ekonferencije.com/sr1/rad/parametric-modeling-of-geometr/3028)