Upadhyay , S. H., S. C. Jain and S. P. Harsha . "Chaos and Nonlinear Dynamic Analysis of High-Speed Rolling Element Bearings due to Varying Number of Rolling Elements" International Journal of Nonlinear Sciences and Numerical Simulation, 10.3 (2011): 323-332. Retrieved 19 May. 2013, from doi:10.1515/IJNSNS.2009.10.3.323

Upadhyay , S., Jain , S. & Harsha , S. (2011). Chaos and Nonlinear Dynamic Analysis of High-Speed Rolling Element Bearings due to Varying Number of Rolling Elements. International Journal of Nonlinear Sciences and Numerical Simulation, 10(3), pp. 273-405. Retrieved 19 May. 2013, from doi:10.1515/IJNSNS.2009.10.3.323

Upadhyay , S. H., S. C. Jain and S. P. Harsha. 2011. Chaos and Nonlinear Dynamic Analysis of High-Speed Rolling Element Bearings due to Varying Number of Rolling Elements. International Journal of Nonlinear Sciences and Numerical Simulation. 10(3): 273-405. Retrieved 19 May. 2013, from doi:10.1515/IJNSNS.2009.10.3.323