1. The Position of the Dental Axis in the Jaws and the Exact Adjustment of the Chief Ray in the intraoral Method With Regard to Maxillary Irregularities;Cieszynski;Int. J. Orthodontia,1925
2. Dental Roentgenography. II. Vertical Angulation, Film Placement and Increased Object-Film Distance;Fitzgerald;J. Am. Dent. A,1947
3. Parallelaufnahmeverfahren bei enoralen Zahnaufnahmen;Hielscher;Deutsche. Zahn. Ztschr,1955
4. Palate Contour as a Limiting Factor in Intraoral X-ray technique;Barr;Oral Surg., Oral Med. & Oral Path,1959
5. The Paralleling Extension-Cone Technique in Intraoral Dental Radiography;Updegrave;Oral Surg., Oral Med. & Oral Path,1951