1. J. Belluz, B. Plumer, B. Resnick, The 7 biggest problems facing science, according to 270 scientists 〈http://www.vox.com/2016/7/14/12016710/science-challeges-research-funding-peer-review-process〉 posted on July 14 (2016)
2. G. F. Vander Voort, Results of an ASTM E-4 round-robin on the precision and bias of measurements of microindentation hardness impressions, in: ASTM STP 1025, Factors that Affect the Precision of MechanicalTests, ed. R. Papirno and H.C. Weiss, ASTM International, W. Conshohocken, PA (1989) pp. 3–39.100 ASTM 691.
3. The service life of ball bearings;Palmgren;Z. Ver. Deut. Ingr.,1924
4. How to determine bearing system life;Zaretsky;Mach. Lubr.,2012
5. E. V. Zaretsky, Rolling Bearing Life Prediction, Theory and Application, NASA Technical Publications NASA/TP-2013-215305, 2013, pp. 57.