1. S. Vujić, R. Stanojević, T. Tanasković, B. Zajić, R. Živojinović, S. Maksimović: Methods for Optimizing the Exploitation Life of Mining Machines, Faculty of Mining and Geology, Belgrade, Elektroprivreda Srbije, Engineering Academy of Serbia and Montenegro, 2004 (in Serbian);
2. D. Krunić-Jagodić, Development of a Service Quality Model of Auxiliary Mechanization at the Lignite Open Pits, Doctoral Dissertation, Faculty of Mining and Geology, University of Belgrade, 2021 (in Serbian);
3. J. Todorić, Maintenance Engineering of Technical Systems, Yugoslav Society for Engines and Vehicles, Belgrade, 1993 (in Serbian);
4. International Electrotechnical Commission, IEC 60050-191:1990, International Electrotechnical Vocabulary -Part 191: Dependability and Quality of Service, International Standard, 1990, Edition 1.0 (https://www.iec.ch/).;
5. I. Janković, Optimization the Concept of the Auxiliary Mechanization Life at the Lignite Open Pits, Doctoral Dissertation, Faculty of Mining and Geology, University of Belgrade, 2020 (in Serbian);