1] prof Vladimir Savić Energy savings using frequency regulation in the hydraulic system with a pump of constant displacement" - 13th International Conference on Accomplishments in Mechanical and Industrial Engineering, 27.02.2017.
(https://ekonferencije.com/en/paper/energy-savings-using-frequency/4853)

2] prof Vladimir Savić TECHNICAL-ECONOMIC VIEW OF THE REPLACEMENT OF PUMPS WITH VARIABLE VOLUME PUMPS A CONSTANT VOLUME OF THE FREQUENCY CONVERTER" - 12. Međunarodna konferencija o dostignućima elektrotehnike, mašinstva i informatike, 02.03.2015.
(https://ekonferencije.com/en/paper/technical-economic-view-of-the/3016)