1. A.A. Andronov, A.A. Vitt, S. Haykin, Teoriya kolebaniy (Theory of oscillations) (Nauka, Moskva, 1981), p. 568. (In Russian)
2. K.R. Hedrih (Stevanovic), Dynamics of a rolling heavy thin disk along rotate curvilinear trace on vertical plane about vertical axis, Proceedings, of the 7th International Congress of the Serbian Society of Mechanics, (32th Yugoslav Congress) 24–16 June 2019, Sremski Karlovci, Serbia, pp. 96–97; ISBN 978-86-909973-7-4; http://www.ssm.org.rsm
3. K.R. Hedrih (Stevanović), A trigger of coupled singularities. Meccanica, 39(3), pp. 295–314 (2004). https://doi.org/10.1023/B:MECC.0000022994.81090.5f
4. K.R. Hedrih (Stevanović), Vibro-impact dynamics in systems with trigger of coupled three singular points: Collision of two rolling bodies. The 24th International Congress of Theoretical and Applied Mechanics (IUTAM ICTAM 2016), Montreal, Canada, 21–26 August, 2016, Book of Papers, pp. 212–213. IUTAM permanent site. ISBN: NR16-127/2016E-EPUB; Catalogue Number: 978-0-660-05459-9
5. K.R. Hedrih (Stevanović), Nonlinear Dynamics of a Heavy Material Particle along a Circle Which Rotates and Optimal Control, Chapter in Book IUTAM Symposium on Chaotic Dynamics and Control of Systems and Processes in Mechanics, Editors: G. Rega, and F. Vestroni, Volume 122 of the series Solid Mechanics and its Applications, (Kluwer and Springer, 2003), pp 37–45. SBN: 978-1-4020-3267-7 (Print) 978-1-4020-3268-4 (Online)