1. Panographic radiography;Nelsen;J.D. Res.,1952
2. Mass dental radiography;Blackman;Radiog.,1956
3. Panoramic X-ray dental machine;Hudson;U.S. Armed Forces M.J.,1957
4. Present status of panoramic roentgenography;Kumpula;J.A.D.A.,1961
5. Pantomography and orthopantomography;Paatero;Oral Surg., Oral Med. & Oral Path.,1961