1. Stratasys: https://www.stratasysdirect.com/manufacturing-services/subtractive-manufacturing/3d-printing-expands-traditional-manufacturing (accessed April 2019).
2. Jaycon Systems: https://medium.com/jaycon-systems/why-is-injection-molding-so-expensive-eda69b6fccb5
3. P.A. Kobryn, N.R. Ontko, L.P. Perkins, and J.S. Tiley: Additive Manufacturing of Aerospace Alloys for Aircraft Structures. Air Force Research Lab Wright-Patterson AFB OH Materials and Manufacturing Directorate, 2006.
4. V.T. Le, H. Paris, and G. Mandil: Process planning for combined additive and subtractive manufacturing technologies in a remanufacturing context. J. Manuf. Syst. 44, 243 (2017).
5. J.R.C. Dizon, A.H. Espera, Q. Chen, and R. Advincula: Mechanical characterization of 3D-printed polymers. Addit. Manuf. 20, 44 (2018).