D. Hofmann, M. Kopp, and B. Bertsche. 16th ISSAT International Conference on Reliability and Quality in Design, page 163-168. Internat. Soc. of Science and Applied Technologies, (2010)176.
P. Fietkau, A. Baumann, and B. Bertsche. Proceedings of the Institution of Mechanical Engineers. Part K, Journal of multi-body dynamics, 226 (1):
3-16(2011)