1. J. K. Kim, H. E. Kim, J. Y. Jung, S. H. Oh and S. H. Jung, Relation between pressure variations and noise in axial type oil piston pumps, Journal of Mechanical Science and Technology, 18 (6) (2004) 1019–1025.
2. J. K. Kim and J. Y. Jung, Measurement of fluid film thickness on the valve plate in oil hydraulic axial piston pumps (I)-Bearing pad effects, Journal of Mechanical Science and Technology, 17 (2) (2003) 246–253.
3. J. K. Kim, H. E. Kim, Y. B. Lee, D. Y. Jung and S. H. Oh, Measurement of fluid film thickness on the valve plate in oil hydraulic axial piston pumps (Part?Spherical design effects), Journal of Mechanical Science and Technology, 19 (2) (2005) 655–663.
4. Y. S. Hong and Y. H. Doh, Analysis on the friction losses of a bent-axis type hydraulic piston pump, Journal of Mechanical Science and Technology, 18 (9) (2004) 1668–1679.
5. H. S. Jeong and H. E. Kim, On the instantaneous and average piston friction of swash plate type hydraulic axial piston machines, Journal of Mechanical Science and Technology, 18 (10) (2004) 1670–1711.