1. Additive Manufacturing Technologies
2. Live Science http://www.livescience.com/38190-stereolithography.html April 2016
3. Live Science http://www.livescience.com/39810-fused-deposition-modeling.html November 2016
4. University of Texas Austin http://www.me.utexas.edu/news/news/selective-laser-sintering-birth-of-an-industry March 2016
5. http://www.wsj.com/articles/auto-makers-others-explore-new-roles-for-3-d-printing-1461626635 2016