Alffram , Per-Axel, Lars Bruce, Lars M. Bjursten, Robert M. Urban, and Gunnar B. J. Andersson. 2009. “Implantation of the Femoral Stem into a Bed of Titanium Granules Using Vibration”. Upsala Journal of Medical Sciences 112 (2):183–189. https://doi.org/10.3109/2000-1967-192.