1. Beginning of radiology in 1896: first news-paper report of discovery of x-ray;Kraft;N Y State J Med,1981
2. Roentgen's experiments with cathode rays and their diagnostic value;Jastrowitz;Dtsch Med Wochenschr,1896
3. The importance of the roentgen pictures for the diagnosis of bone disease;Konig;Dtsch Med Wochenschr,1896
4. A brief history of endodontics;Grossman;J Endod,1982
5. Otto Walkhoff: renaissance man of dentistry;Rezai;Bull Hist Dent,1986