M. H. Pol and A. Bidi and A. V. Hoseini, Estimation of Natural Frequency of the Bearing System under Periodic Force Based on Principal of Hydrodynamic Mass of Fluid. journal = {International Journal of Mechanical and Mechatronics Engineering}, [online]. World Academy of Science, Engineering and Technology. July 2009, vol. 31(7). 835 - 839 [viewed 21 September 2024]. Available from: https://publications.waset.org/pdf/3170.