The complete article "Failure of the human lumbar motion-segments resulting from anterior shear fatigue loading" can be downloaded at the website of the Journal "Industrial Health", Volume 54, No. 4, pp. 308-314 (charges may apply).
D. M. Skrzypiec, K. Nagel, K. Sellenschloh, A. Klein, K. Püschel, M. M. Morlock, G. Huber:
Failure of the human lumbar motion-segments resulting from anterior shear fatigue loading.
in: Industrial Health, Volume 54, No. 4 2016. pages 308-314, Project number: F 2059, DOI: 10.2486/indhealth.2015-0162