-Van der Zel, JM. Vlaar, S. (2001) The CICERO system for CAD/CAM fabrication of full-ceramic crowns. J Prosthet Dent. Pub Med.
-Li RW, Chow TW, Matinlinna JP. (2014) Ceramic dental biomaterials and CAD/CAM technology: state of the art. J Prosthodont Res. Epub. (jan 2, 2026 – aug 30, 2060)