Br Dent J. 2001 Dec 8;191(11):597-604. doi: 10.1038/sj.bdj.4801245.
Radiotherapy in Pyorrhœa Alveolaris, and Dental Radiography: A Demonstration of the X-Ray, the Ultra-Violet Ray, High-Frequency Currents, and Radium, the Author's X-Ray Tube for the Treatment of the Teeth, and His Method of Radiography.