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2. U.S. Patent 5,121,329, June 9, 1989, "Apparatus and Method for Creating Three-Dimensional Objects" (A system and a method for building three-dimensional objects in a layer-by-layer manner via fused deposition modeling).
3. Use of stereolithography to manufacture critical-sized 3D biodegradable scaffolds for bone ingrowth;Cooke;J Biomed Mater Res B Appl Biomater,2003
4. Dimensional error of selective laser sintering, three-dimensional printing and PolyJet models in the reproduction of mandibular anatomy;Ibrahim;J Cranio-Maxillo-Fac Surg,2009