[ASTM D644. 2015. Standard test method for acid number of petroleum products by potentiometric titration. Hach Company/Hach Lange GmbH.]Search in Google Scholar
[ČEDÍK, J. – PEXA, M. – PETERKA, B. – HOLUBEK, M. – MADER, D. – PRAŽAN, R. 2018. Effect of biobutanol-sunflower oil-diesel fuel blends on combustion characteristics of compression ignition engine. In Acta Technologica Agriculturae, vol. 21, no. 4, pp. 130–135.]Search in Google Scholar
[DIN 51399-2. 2010. Testing of lubricants – Determination of elements content of additives, wear and other contaminations. Part 2: Wavelength dispersive X-ray fluorescence spectrometry (XRF).]Search in Google Scholar
[DIN 51829. 2010. Petroleum products – Determination of additive and wear elements in greases – Analysis by wavelength dispersive X-ray fluorescence spectrometry.]Search in Google Scholar
[DOSTÁL, P. – ROZLIVKA, J. – KUMBÁR, V. 2019. Operational degradation of engine oil in agricultural technology. In Acta Technologica Agriculturae, vol. 21, no. 1, pp. 17–21.]Search in Google Scholar
[EHK Regulation No 13 of the Economic Commission for Europe of the United Nations (UN/ECE). 2015. Uniform provisions concerning the approval of vehicles of categories M, N and O with regard to braking, [2016/194], 2015.]Search in Google Scholar
[HELEBRANT, F. – ZIEGLER, J. – MARASOVÁ, D. 2001. Technical Diagnostic and Reliability I. Tribodiagnostic. Ostrava : VŠB – Technical University of Ostrava. (In Czech: Diagnostika a spolehlivost I. Tribodiagnostika)]Search in Google Scholar
[HLAVÁČ, P. – BOŽIKOVÁ, M. – PETROVIĆ, A. 2019. Selected physical properties assessment of sunflower and olive oils. In. Acta Technologica Agriculturae, vol. 21, no. 3, pp. 86–91.]Search in Google Scholar
[HUJO, Ľ. – KANGALOV, P. G. – KOSIBA, J. 2015. Laboratory test devices for evaluating the lifetime of tractor hydraulic components: proceedings, methods and applications. Ruse : Angel Kanchev University of Ruse, 69 pp. (scientific monograph)]Search in Google Scholar
[HUJO, Ľ. 2017. Design of Laboratory Test Device for Testing of Hydrostatic Transducers and Hydraulic Fluids Used in Mobile Energy Devices. Nitra : Slovak University of Agriculture in Nitra, 158 pp. (In Slovak: Návrh laboratórneho zariadenia pre skúšanie hydrostatických prevodníkov a hydraulických kvapalín využívaných v mobilních energetických prostriedkoch)]Search in Google Scholar
[JABLONICKÝ, J. – OPÁLENÝ, P. – UHRINOVÁ, D. – TULÍK, J. – SAVIN, L. 2019. Influence of ecological fluid on the wet disc brake system of the tractor. In 7th International Conferencie on Trends in Agricultural Engineering 2019, Prague, pp. 218–224.]Search in Google Scholar
[JANOŠKO, I. – ČERNECKÝ, J. – BRODNIANSKA, Z. – HUJO, Ľ. 2016. Environmental Technologies and Engineering. Nitra : Slovak University of Agriculture in Nitra, 306 pp. (In Slovak: Environmentálne technológie a technika)]Search in Google Scholar
[JANOŠKO, I. – POLONEC, T. – LINDÁK, S. 2014. Performance parameters monitoring of the hydraulic system with bio-oil. In Research in Agricultural Engineering, vol. 60, special issue, pp. 37–43.]Search in Google Scholar
[JANOŠKO, I. – ŠIMOR, R. – CHRASTINA, J. 2010. The bio-oil testing used in the hydraulic system of the vehicle for waste collection. In Acta Technologica Agriculturae, vol. 13, no. 4, pp. 103–108.]Search in Google Scholar
[KAMIŃSKI, Z. – CZABAN, J. 2012. Diagnosing of the agricultural tractor braking system within approval tests. In Eksploatacja i Niezawodnosc – Maintenance and Reliability, vol. 14, no. 4, pp. 319–326.]Search in Google Scholar
[KOSIBA, J. – TKÁČ, Z. – HUJO, Ľ. – STANČÍK, B. – ŠTULAJTER, I. 2013. The operation of agricultural tractor with universal ecological oil. In Research in Agricultural Engineering, vol. 59, special issue, pp. 27–33.]Search in Google Scholar
[KUČERA, M. – ALEŠ, Z. – PEXA, M. 2016. Detection and characterization of wear particles of universal tractor oil using a particles size analyser. In Agronomy Research, vol. 14, no. 4, pp. 1351–1360.]Search in Google Scholar
[Law No. 106/2018. Law on the operation of vehicles in road traffic and on amendments to certain Acts.]Search in Google Scholar
[MAJDAN, R. – OLEJÁR, M. – ABRAHÁM, R. – ŠAREA, V. – UHRINOVÁ, D. – JÁNOŠOVÁ, M. – NOSIAN, J. 2018. Pressure source analysis of a test bench for biodegradable hydraulic oils. In Tribology in Industry, vol. 40, no. 2, pp. 183–194.]Search in Google Scholar
[MAJDAN, R. – TKÁČ, Z. – KANGALOV, P. G. 2013. Research of Ecological Oil-Based Fluids Properties and New Test Methods for Lubrication Oils. Ruse : Angel Kanchev University of Ruse, 98 pp. (scientific monograph)]Search in Google Scholar
[MANG, T. – BOBZIN, K. – BARTELS, T. 2010. Industrial Tribology: Tribosystems, Friction, Wear and Surface Engineering, Lubrication. Wiley, 672 pp. ISBN: 978-3-527-32057-8.10.1002/9783527632572]Search in Google Scholar
[STN 65 6207. 1986. Hydraulic oils and liquids. Sampling for determination of mechanic impurities.]Search in Google Scholar
[STN EN 16896. 2017. Petroleum products and related products – Determination of kinematic viscosity – Method by Stabinger type viscosimeter.]Search in Google Scholar
[STOPKA, J. 2018. Lubrications and environment. In Tribotechnika, pp. 46–49. (In Slovak: Mazivá a životné prostredie)]Search in Google Scholar
[TKÁČ, Z. – MAJDAN, R. – KOSIBA, J. 2014. Research of Properties of Ecological Fluids and New Testing Method of Lubricating Oils. Nitra : Slovak University of Agriculture in Nitra., 94 pp. (In Slovak: Výskum vlastností ekologických kvapalín a nových testovacích metód mazacích olejov)]Search in Google Scholar
[TÓTH, F. – RUSNÁK, J. – KADNÁR, M. – VÁLIKOVÁ, V. 2014. Study of tribological properties of chosen types of environmentally friendly oils in combined friction conditions. In Journal of Central European Agriculture, vol. 15, no. 1, pp. 185–192.]Search in Google Scholar
[TULÍK, J. 2013. Analysis of hydraulic fluids properties used in hydraulic systems of transport and handling technics. Nitra : Slovak University of Agriculture in Nitra. (In Slovak: Analýza vlastností hydraulických kvapalín používaných v hydraulických systémech dopravnej a manipulačnej techniky) (PhD thesis)]Search in Google Scholar