A radiographic analysis of common 3D print materials and assessment of their fidelity within vertebral models oleh Michael W. Pullen, Robert A. Pooley, James M. Kofler, Jr, Fidel Valero-Moreno, Andres Ramos-Fresnedo, Ricardo A. Domingo, Carlos Perez-Vega, W. Christopher Fox, Sukhwinder Johnny S Sandhu, Alfredo Quinones-Hinojosa, Ian A. Buchanan