1. Ueber eine neue Art von Strahlen, Vorläufige Mitteilung. [On a New Kind of Rays. Preliminary Presentation];Röntgen,1895
2. Dental Roentgenology;Ennis,1939
3. Making darkness visible: the discovery of X-ray and its introduction to dentistry;Jacobsohn;JADA,1995
4. Textbook of Dental Radiography;Langeland,1984
5. Imaging properties of interoral xeroradiography;Gratt;JADA,1979