1. 1) Fraunhofer ILT, http://www.ilt.fraunhofer.de/eng/ilt/pdf/eng/products/RapidPrototyping.pdf (accessed 2010/10/12).
2. 2) L. Facchini et al : Microstructure and Mechanical Properties of Ti-6Al-4V Produced by Electron Beam Melting of Pre-alloyed Powders, Rapid Prototyping Journal, 15, 3 (2009) 171.
3. 3) T. Wohlers : Wohlers Report 2005, Wohlers Associate Inc., CO, USA, (2007) 157.
4. 4) N. Hopkinson, R. Hague and P. Dickens : Rapid Manufacturing—An Industrial Revolution for the Digital Age—, John Wiley & Sons, Ltd., West Sussex, UK, (2006)232.
5. 5) Freedom of Creation, http://www.freedomofcreation.com/ (accessed 2010/9/12).