8Steven R Schmid, Bernard J. Hamrock, Bo. O. Jacobson, (2004) Fundamentals of Machine Elements, 3rd , Prentice Hall.
9https://biomedical.materialise.com/mis last accessed April 2016
10https://www.mscsoftware.com/en-asean/node/970last accessed April 2016
11https://www.healthline.com/health/atherosclerosis last accessed April 2016
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