Smith, R. A.; Hillmansen, S. (2004). "A brief historical overview of the fatigue of railway axles". Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit. 218 (4): 267–77. doi:10.1243/0954409043125932. S2CID109401654.
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Smith, R. A.; Hillmansen, S. (2004). "A brief historical overview of the fatigue of railway axles". Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit. 218 (4): 267–77. doi:10.1243/0954409043125932. S2CID109401654.