1. Selective Laser Sintering of Metals;Bourell,1994
2. Three Dimensional Printing: Rapid Tooling and Prototypes Directly from CAD Representation;Sachs,1990
3. Laminated Object Manufacturing (LOM): A Simpler Process;Faygin,1991
4. Accurate Rapid Prototyping by the Solid Ground Curing Technology;Levi,1991
5. Thermal Spray Shape Deposition;Weiss;Journal of Thermal Spray Technology,1992